Earnings Per Share [Abstract] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share Basic And Diluted by Common Class [Table] Schedule of Earnings Per Share Basic And Diluted by Common Class [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common stock, Class A Common Class A [Member] Non-voting common stock, Class B Common Class B [Member] Restricted common stock, Class C Common Class C [Member] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Restricted stock Restricted Stock [Member] Stock options Employee Stock Option [Member] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Schedule of Earnings Per Share Basic And Diluted by Common Class [Line Items] Schedule of Earnings Per Share Basic And Diluted by Common Class [Line Items] Earnings for basic computations Undistributed Earnings, Basic Weighted-average common shares outstanding for basic computations Weighted Average Number of Shares Outstanding, Basic Earnings for diluted computations Undistributed Earnings, Diluted Dilutive stock options and restricted stock Weighted Average Number Diluted Shares Outstanding Adjustment Average number of common shares outstanding for diluted computations Weighted Average Number of Shares Outstanding, Diluted Earnings per common share, Basic Earnings Per Share, Basic Earnings per common share, Diluted Earnings Per Share, Diluted Unvested shares participating in the payment of the Company's dividends declared Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights Unvested shares, cash dividends paid Payments of Capital Distribution Undistributed earnings allocated to participating securities, basic Undistributed Earnings Allocated To Participating Securities, Basic Undistributed Earnings Allocated To Participating Securities, Basic Undistributed earnings allocated to participating securities, diluted Undistributed Earnings Allocated to Participating Securities, Diluted Undistributed Earnings Allocated to Participating Securities, Diluted Antidilutive options excluded from the computation of EPS Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Statement of Cash Flows [Abstract] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Net Income (Loss) Attributable to Parent Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Stock-based compensation expense Share-based Compensation Excess tax benefits from the exercise of stock options Excess Tax Benefit from Share-based Compensation, Operating Activities Amortization of debt issuance costs and loss on extinguishment Amortization of Financing Costs and Discounts Losses on dispositions and impairments Losses on Disposition of Property and Intangible Impairment Losses on Disposition of Property and Intangible Impairment Gain on sales of businesses Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Other long-term assets Increase (Decrease) in Other Noncurrent Assets Accrued compensation and benefits Increase (Decrease) in Employee Related Liabilities Accounts payable and other accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Transaction costs on acquisitions and dispositions Transaction Costs On Acquisitions and Dispositions Transaction Costs on Acquisitions and Dispositions Accrued interest Increase (Decrease) in Interest Payable, Net Other current liabilities Increase (Decrease) in Other Operating Liabilities Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Cash paid for business acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Proceeds from sales of businesses Proceeds from Divestiture of Businesses Escrow payments Increase (Decrease) in Deposit Assets Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net proceeds from issuance of common stock Proceeds from Issuance of Common Stock Stock option exercises Proceeds from Stock Options Exercised Excess tax benefits from the exercise of stock options Excess Tax Benefit from Share-based Compensation, Financing Activities Repurchases of common stock Payments for Repurchase of Common Stock Cash dividends paid Payments of Ordinary Dividends, Common Stock Dividend equivalents paid to option holders Debt issuance costs Payments of Financing Costs Repayment of debt Repayments of Debt Proceeds from debt issuance Proceeds from Issuance of Long-term Debt Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents-beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents-end of period Supplemental disclosures of cash flow information Supplemental Cash Flow Information [Abstract] Cash paid during the period for: Cash Payments Abstract Cash paid during the period for: Interest Interest Paid Income taxes Income Taxes Paid, Net Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Restricted Stock [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] EIP Amended and Restated Equity Incentive Plan [Member] Amended and Restated Equity Incentive Plan [Member] Annual Incentive Plan Annual Incentive Plan [Member] Annual Incentive Plan [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Stock options granted, value, per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Stock options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share Based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value Share Based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value Share Based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Repurchase of common stock, in shares Treasury Stock, Shares, Acquired Repurchase of common stock, cost per share Treasury Stock Acquired, Average Cost Per Share Repurchase of common stock Treasury Stock, Value, Acquired, Cost Method Organization, Consolidation and Presentation of Financial Statements [Abstract] Number of employees Entity Number of Employees Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Secured Debt Secured Debt [Member] Revolving Credit Facility Revolving Credit Facility [Member] Letter of Credit Letter of Credit [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Term Loan A Tranche-A Loans [Member] Tranche A Loans [Member] Term Loan B Tranche B Loans [Member] Tranche B Loans [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Alternative Base Rate (ABR) Alternative Base Rate (ABR) [Member] Alternative Base Rate (ABR) [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Long-term Debt, Current and Noncurrent [Abstract] Long-term Debt, Current and Noncurrent [Abstract] Interest rate Debt Instrument, Interest Rate at Period End Long-term debt Long-term Debt Less: Current portion of long-term debt Long-term Debt, Current Maturities Long-term debt, net of current portion Long-term Debt, Excluding Current Maturities Term loan, face amount Debt Instrument, Face Amount Revolving credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Quarterly principal periodic payment percentage Debt Instrument, Quarterly Periodic Payment Percentage, Principal Debt Instrument, Quarterly Periodic Payment Percentage, Principal Quarterly principal periodic payment percentage, year two Debt Instrument, Quarterly Periodic Payment Percentage, Principal, Year Two Debt Instrument, Quarterly Periodic Payment Percentage, Principal, Year Two Quarterly principal periodic payment percentage, year three Debt Instrument, Quarterly Periodic Payment Percentage, Principal, Year Three Debt Instrument, Quarterly Periodic Payment Percentage, Principal, Year Three Quarterly principal periodic payment percentage, year four Debt Instrument, Quarterly Periodic Payment Percentage, Principal, Year Four Debt Instrument, Quarterly Periodic Payment Percentage, Principal, Year Four Quarterly principal periodic payment percentage, year five Debt Instrument, Quarterly Periodic Payment Percentage, Principal, Year Five Debt Instrument, Quarterly Periodic Payment Percentage, Principal, Year Five Revolving credit facility, amount outstanding Line of Credit Facility, Amount Outstanding Long-term debt, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Long-term debt, unamortized discount Debt Instrument, Unamortized Discount Payables and Accruals [Abstract] Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Receivables [Abstract] ACCOUNTS RECEIVABLE, NET Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Equity [Abstract] STOCKHOLDERS' EQUITY Stockholders' Equity Note Disclosure [Text Block] Subsequent Events [Abstract] SUBSEQUENT EVENTS Subsequent Events [Text Block] Debt Schedule of Debt [Table Text Block] ACCUMULATED OTHER COMPREHENSIVE LOSS Comprehensive Income (Loss) Note [Text Block] Stock-based compensation expense recognized in the condensed consolidated statements of operations Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of unrecognized compensation cost Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block] Recorded stock-based compensation liabilities Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Other Liabilities Disclosure [Abstract] OTHER LONG-TERM LIABILITIES Other Liabilities Disclosure [Text Block] Accrued Compensation and Benefits [Abstract] ACCRUED COMPENSATION AND BENEFITS Accrued compensation and benefits Schedule of Accrued Compensation And Benefits [Table Text Block] Schedule of Accrued Compensation And Benefits [Table Text Block] EARNINGS PER SHARE Earnings Per Share [Text Block] Related Party Transactions [Abstract] RELATED-PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Special voting common stock, Class E Common Class E [Member] Classification of common stock that has different rights than Common Class A, B or C shares, representing the voting rights that accompany options that were issued in exchange for old stock rights that existed prior to the merger with The Carlyle Group. Class of Stock [Line Items] Class of Stock [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares issued, beginning of period Shares, Outstanding Issuance of common stock Stock Issued During Period, Shares, New Issues Stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Share exchange Stock Issued During Period Shares, Share Exchange Stock ssued During Period Shares, Share Exchange Common stock, shares issued, end of period Treasury stock, shares, beginning of period Treasury Stock, Shares Repurchase of common stock Treasury stock, shares, end of period BUSINESS OVERVIEW Nature of Operations [Text Block] Compensation and Retirement Disclosure [Abstract] Employees’ Capital Accumulation Plan, Total expense recognized Defined Contribution Plan, Cost Recognized Employees’ Capital Accumulation Plan, Company-paid contributions Defined Contribution Plan, Employer Discretionary Contribution Amount Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Officer Medical Plan Other Pension Plan, Postretirement or Supplemental Plans, Defined Benefit [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Net actuarial loss Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Total benefit cost Defined Benefit Plan, Net Periodic Benefit Cost Defined benefit plan, unfunded status of plan Defined Benefit Plan, Funded Status of Plan Beginning of year Accumulated Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts reclassified from accumulated other comprehensive loss Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Net current-period other comprehensive income Other Comprehensive Income (Loss), Net of Tax End of year Unrecognized compensation cost related to unvested stock-based compensation agreements Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Unrecognized compensation cost, amortization period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Dividend, Type [Axis] Dividend, Type [Axis] Dividend, Type [Axis] Dividend, Type [Domain] Dividend, Type [Domain] Dividend, Type [Domain] Special Cash Dividend Special Cash Dividend [Member] Special Cash Dividend [Member] Ordinary Cash Dividend Ordinary Cash Dividend [Member] Ordinary Cash Dividend [Member] Rollover Options Rollover Options [Member] Rollover Options [Member] Dividends declared per share Common Stock, Dividends, Per Share, Declared Share-based compensation arrangement, plan modification, incremental compensation cost recognized in period Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost Recognized Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost Recognized Share-based compensation arrangement, plan modification, incremental compensation cost, deferred Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Deferred Incremental Compensation Cost Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Deferred Incremental Compensation Cost Recorded and unrecorded stock-based compensation liability, current and noncurrent Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent, Recorded and Unrecorded Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent, Recorded and Unrecorded Stock-based compensation liability, current Deferred Compensation Share-based Arrangements, Liability, Current Stock-based compensation liability, noncurrent Deferred Compensation Share-based Arrangements, Liability, Classified, Noncurrent Stock-based compensation liability, current and noncurrent Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent Unrecorded stock-based compensation liability, current and noncurrent Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent, Unrecorded Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent, Unrecorded Share-based compensation arrangement, plan modification, incremental compensation cost, deferred, recognition period Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Deferred Incremental Compensation Cost, Recognition Period Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Deferred Incremental Compensation Cost, Recognition Period Income Tax Disclosure [Abstract] Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent ACCRUED COMPENSATION AND BENEFITS Accrued Compensation and Benefits [Text Block] The entire disclosure for accrued compensation and benefits to include bonus, retirement, vacation and other. ACCOUNTS PAYABLE AND OTHER ACCRUED EXPENSES Accounts Payable and Accrued Liabilities Disclosure [Text Block] BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Other Long-Term Liabilities Schedule of Other Assets and Other Liabilities [Table Text Block] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Income Statement Location [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Income Statement Location [Domain] Cost of revenue Cost of Sales [Member] General and administrative expenses General and Administrative Expense [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Stock-based compensation expense Allocated Share-based Compensation Expense Number of facility leases assigned to Booz & Co., outstanding Number of Facility Leases Assigned to Predecessor Company, Outstanding Number of Facility Leases Assigned to Predecessor Company, Outstanding Maximum potential amount of undiscounted future lease payments Guarantor Obligations, Maximum Exposure, Undiscounted Liability for reductions and/or penalties from U.S Governement audits Liability for Cost Reductions And Penalties, Contracts with U S Government and Government Agencies Liability for Cost Reductions And Penalties, Contracts with US Government and Government Agencies Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Contracts with U.S. government agencies or other U.S. government contractors Government Contracts Concentration Risk [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Concentration risk, percentage Concentration Risk, Percentage Income tax reserve Liability for Uncertain Tax Positions, Noncurrent Deferred rent Deferred Rent Credit, Noncurrent Deferred compensation Deferred Compensation Liability, Classified, Noncurrent Stock-based compensation Deferred payment obligation Liabilities of Business Transferred under Contractual Arrangement, Noncurrent Postretirement benefit obligations Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Other Other Long- Term Liabilities Other Long- Term Liabilities Total other long-term liabilities Other Liabilities, Noncurrent Vendor payables Accounts Payable, Trade, Current Accrued expenses Accrued Liabilities, Current Total accounts payable and other accrued expenses Accounts Payable and Accrued Liabilities, Current Bonus Accrued Bonuses, Current Retirement Capital Accumulation Plans, Current Liabilities Employer contribution to ECAP plan. Vacation Accrued Vacation, Current Stock Based Compensation Liability Stock Based Compensation Liability Stock Based Compensation Liability Deferred Compensation Other Deferred Compensation Arrangements, Liability, Current Other Other Employee Related Liabilities, Current Total accrued compensation and benefits Employee-related Liabilities, Current Statement of Comprehensive Income [Abstract] Change in postretirement plan costs, net of tax Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent STOCK-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Common stock shares activity Schedule of Common Stock Outstanding Roll Forward [Table Text Block] Schedule of accumulated other comprehensive loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reclassification out of accumulated other comprehensive loss to net income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Income Statement [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Revenue Sales Revenue, Services, Net Operating costs and expenses: Costs and Expenses [Abstract] Cost of revenue Cost of Services, Direct Labor, Employee Benefits, and Overhead Cost of revenue includes direct labor, related employee benefits, and overhead. Billable expenses Billable Expenses Billable expenses include direct subcontractor expenses, travel expenses, and other expenses incurred to perform on contracts. General and administrative expenses General and Administrative Expense Total operating costs and expenses Costs and Expenses Operating income Operating Income (Loss) Interest expense Interest Expense Other, net Other Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net income Earnings per common share (Note 3): Basic (in dollars per share) Diluted (in dollars per share) Document and Entity Information [Abstract] Common Stock [Member] Common Stock [Member] Special voting common stock, Class E Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Statement of Financial Position [Abstract] Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Treasury stock, shares Fair Value Disclosures [Abstract] Fair value of cash and cash equivalents Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Employee Stock Purchase Plan Employee Stock [Member] Shares purchased by employees under the employee stock purchase plan Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Total Estimate of Fair Value Measurement [Member] Asset Class [Axis] Asset Class [Axis] Fair Value by Asset Class [Domain] Asset Class [Domain] Cash and cash equivalents Cash [Member] Money market fund Money Market Funds [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Total cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure DEBT Debt Disclosure [Text Block] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable, net of allowance Accounts Receivable, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net of accumulated depreciation Property, Plant and Equipment, Net Intangible assets, net of accumulated amortization Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Other long-term assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Current portion of long-term debt Accounts payable and other accrued expenses Accrued compensation and benefits Other current liabilities Other Liabilities, Current Total current liabilities Liabilities, Current Other long-term liabilities Total liabilities Liabilities Commitments and contingencies (Note 16) Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock Common Stock, Value, Issued Treasury stock, at cost — 574,447 shares at December 31, 2013 and 405,843 shares at March 31, 2013 Treasury Stock, Value Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Legal proceedings and investigations arising in the ordinary course of business Legal Proceedings for Employment, Contract, Intellectual Property, Other Business Matters [Member] Legal Proceedings for Employment, Contract, Intellectual Property, Other Business Matters [Member] Former stockholder litigation Former Stockholder Litigation [Member] Former Stockholder Litigation [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case Type [Domain] Litigation Case [Domain] RICO Racketeer Influenced and Corrupt Organizations Act [Member] Racketeer Influenced and Corrupt Organizations Act [Member] Litigation Court [Axis] Litigation Court [Axis] Litigation Court [Axis] Litigation Court Type [Domain] Litigation Court Type [Domain] Litigation Court Type [Domain] United States District Court for the Southern District of New York United States District Court for Southern District of New York [Member] United States District Court for Southern District of New York [Member] New York state court New York State Court [Member] New York State Court [Member] United States District Court for the Southern District of California United States District Court for Southern District of California [Member] United States District Court for Southern District of California [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Loss contingencies, number of plaintiffs Loss Contingency, Number of Plaintiffs Loss contingencies, new claims filed, number Loss Contingency, New Claims Filed, Number Loss contingencies, claims amended, number Loss Contingency, Claims Amended, Number Loss Contingency, Claims Amended, Number Loss contingencies, claims dismissed, number Loss Contingency, Claims Settled and Dismissed, Number Loss contingencies, pending claims, number Loss Contingency, Pending Claims, Number Loss contingencies, damages sought, value Loss Contingency, Damages Sought, Value INCOME TAXES Income Tax Disclosure [Text Block] Components of net postretirement medical expense Schedule of Net Benefit Costs [Table Text Block] EMPLOYEE BENEFIT PLANS Pension and Other Postretirement Benefits Disclosure [Text Block] Accounts receivable, net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Accumulated Defined Benefit Plans Adjustment Accumulated Defined Benefit Plans Adjustment [Member] Reclassification out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Total before tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax Tax benefit Net of tax Net Income (Loss) Available to Common Stockholders, Basic FINANCIAL INSTRUMENTS Fair Value Disclosures [Text Block] Current Accounts Receivable, Net, Current [Abstract] Accounts receivable–billed Current Accounts Receivable, Billed Amounts due within one year of the balance sheet date (or the normal operating cycle, whichever is longer), that have been billed to customers under contracts or programs but not paid as of the balance sheet date. Accounts receivable–unbilled Current Accounts Receivable, Unbilled Amounts due within one year of the balance sheet date (or the normal operating cycle, whichever is longer), that have not been billed to customers for services rendered or to be rendered. Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Accounts receivable, net Long-term Accounts Receivable, Net, Noncurrent [Abstract] Unbilled receivables Noncurrent Accounts Receivable, Unbilled Noncurrent Accounts Receivable, Unbilled Total accounts receivable, net Accounts Receivable, Net Provision for doubtful accounts Provision for Doubtful Accounts Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Dividend equivalent per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Dividend Equivalent, Per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Dividend Equivalent, Per Share Revenue associated with related parties Revenue from Related Parties Cost associated with related parties Costs and Expenses, Related Party Management agreement, annual fee Management Agreement, Annual Fee Management Agreement, Annual Fee Management agreement, advisory fees Related Party Transaction, Management Agreement Advisory Fees Related Party Transaction, Management Agreement Advisory Fees Reconciliation of the income used to compute basic and diluted EPS Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]