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Parent Other Comprehensive Income (Loss), Cash Flow Hedge And Investments, Gain (Loss), After Reclassification And Tax, Parent Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Segment Reporting [Table] Segment Reporting [Table] Excise tax liability Share Repurchase Program, Excise Tax Schedule of Maturities of Long-Term Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Schedule of Components of Lease Expense Lease, Cost [Table Text Block] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Income from operations Operating Income (Loss) Expected renewal balance Line Of Credit Facility, Expected Renewal Balance Line Of Credit Facility, Expected Renewal Balance Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Amount of net gain (loss) reclassified into earnings Amount Of Net Gain (Loss) Reclassified Into Earnings [Member] Amount Of Net Gain (Loss) Reclassified Into Earnings ACQUISITIONS Business Combination [Text Block] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Impairment losses Asset, Impairment Loss Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Common stock, shares issued (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] ACCUMULATED OTHER COMPREHENSIVE 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Description [Table] Lessee, Lease, Description [Table] Purchase of treasury stock Treasury Stock, Value, Acquired, Cost Method Cash, cash equivalents and restricted cash — beginning of period Cash, cash equivalents and restricted cash — end of period Total cash, cash equivalents and restricted cash — end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Base Rate Base Rate [Member] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Schedule of Effect of Derivatives Financial Instruments on Other Comprehensive Income (Loss) Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] ORGANIZATION AND BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Total lease expense Lease, Cost LEASES Lessee, Operating Leases [Text Block] Thereafter Long-Term Debt, Maturity, after Year Four Long-Term Debt, Maturity, after Year Four 2027 Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Common stock — basic (in dollars per share) Earnings per common share — basic (in dollars per share) Earnings Per Share, Basic Purchase of treasury stock Payments for Repurchase of Common Stock Deferred revenue Contract with Customer, Liability, Current Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Long-term debt — net Long-term debt Long-Term Debt, Excluding Current Maturities Cost of services Cost of Revenue Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Restricted cash, included in other assets Restricted Cash, Noncurrent Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Available-for-sale debt securities fair value Debt Securities, Available-for-Sale Fair Value Measurement [Domain] Fair Value Measurement [Domain] Contingent consideration recorded Business Combination, Contingent Consideration, Liability Operating lease expense Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] One-Month Term SOFR One-Month Term SOFR [Member] One-Month Term SOFR UNITED KINGDOM UNITED KINGDOM Derivative Contract [Domain] Derivative Contract [Domain] Effect of foreign currency translation Goodwill, Foreign Currency Translation, Gain (Loss) Equity Awards Adjustments Equity Awards Adjustments [Member] Number of business acquisition transactions Number of Business Acquisition Transactions Number of Business Acquisition Transactions Hedging Relationship [Domain] Hedging Relationship [Domain] October 31, 2026 Expiration Date Two [Member] Expiration Date Two Total liabilities and stockholders’ equity Liabilities and Equity Variable lease expense Variable Lease, Cost Options Share-Based Payment Arrangement, Option [Member] Segments [Axis] Segments [Axis] Other current and long-term liabilities Increase (Decrease) in Other Operating Liabilities Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three Remainder of 2026 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Expiration Date [Axis] Expiration Date [Axis] Expiration Date Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Accounts receivable — net of allowance for credit losses of $3,406 and $3,667 at June 30, 2026 and December 31, 2025, respectively Receivables, Net, Current Preferred stock, $0.001 par value; 25,000,000 shares authorized; no shares issued or outstanding at June 30, 2026 and December 31, 2025 Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Revolving Credit Facility - USD Portion Revolving Credit Facility - USD Portion [Member] Revolving Credit Facility - USD Portion Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash payments of interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Name Measure Name INCOME TAXES Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Fair Value of Derivative Financial Instruments Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Indefinite-lived Intangible Assets [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] Impairment loss Goodwill impairment loss Goodwill, Impairment Loss Educational advisory services Educational Advisory Services [Member] Educational Advisory Services Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Retirement of treasury stock Treasury Stock, Retired, Cost Method, Amount Company Selected Measure Amount Company Selected Measure Amount Depreciation and amortization Depreciation, Depletion and Amortization Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Intangible Assets [Table] Intangible Assets [Table] Intangible assets. Expiration Date [Domain] Expiration Date [Domain] Expiration Date [Domain] Current assets: Assets, Current [Abstract] Interest rate caps Interest Rate Cap [Member] Weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Interest Rate Floor Interest Rate Floor [Member] Entity Address, Address Line One Entity Address, Address Line One Operating right-of-use assets obtained in exchange for operating lease liabilities — net Right-of-Use Asset Obtained in Exchange for Operating Lease Liability North America North America [Member] Income tax expense Income tax effect Income Tax Expense (Benefit) Payment Rate in Year Four Payment Rate in Year Four [Member] Payment Rate in Year Four Award Timing Method Award Timing Method [Text Block] Net increase in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Net income Net income Net income Net of income taxes Net Income (Loss) Attributable to Parent SOFR Floor SOFR Floor [Member] SOFR Floor Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Changes in Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Shares received in net share settlement of stock option exercises and vesting of restricted stock Exchange Of Stock Options, Amount Exchange Of Stock Options, Amount Accounts receivable Increase (Decrease) in Receivables Retirement of treasury stock (in shares) Treasury Stock, Shares, Retired Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] October 31, 2025 Expiration Date One [Member] Expiration Date One