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periods Contract with Customer, Performance Obligation Satisfied in Previous Period Tabular List, Table Tabular List [Table Text Block] Leases [Abstract] New Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Guarantor obligations, facility Guarantor Obligations, Maximum Exposure, Undiscounted Goodwill [Line Items] Goodwill [Line Items] Strategic Communications Strategic Communications Segment [Member] Strategic Communications [Member] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Earnings per common share — basic (in dollars per share) Earnings per common share — basic (in dollars per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts payable, accrued expenses and other Increase (Decrease) in Accounts 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Depreciation and Amortization Schedule Of Reconciliation Of Adjusted Segment E B I T D A Table [Table Text Block] Reconciliation of adjusted segment EBITDA to income before income tax provision. Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Purchase and retirement of common stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Base Rate Base Rate [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Accounts receivable, billed and unbilled Increase (Decrease) in Accounts Receivable Restructuring Cost [Table] Restructuring Cost [Table] Entity Current Reporting Status Entity Current Reporting Status Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Financing activities Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] Operating income Operating Income (Loss) Line of Credit Line of Credit [Member] Retained earnings Retained Earnings (Accumulated Deficit) Schedule of Stock Repurchases Schedule Of Stock Repurchase [Table Text Block] Schedule Of Stock Repurchase [Table Text Block] Numerator — basic and diluted Earnings Per Share Basic and Diluted Numerator [Abstract] Earnings Per Share Basic and Diluted Numerator [Abstract] Statement of Financial Position [Abstract] 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] Executive Category: Executive Category [Axis] Current Fiscal Year End Date Current Fiscal Year End Date Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Schedule of Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Statement [Table] Statement [Table] Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Variable Rate [Domain] Variable Rate [Domain] Antidilutive stock options and share-based awards (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount All Adjustments to Compensation All Adjustments to Compensation [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Accounts payable, accrued expenses and other Accounts Payable and Accrued Liabilities, Current Amendment Flag Amendment Flag Effect of dilutive stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements, Stock Options Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements, Stock Options Leases Lessee, Operating Leases [Text Block] Termination Date Trading Arrangement Termination Date Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Weighted average discount rate, Operating leases Operating Lease, Weighted Average Discount Rate, Percent Basis of Presentation and Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Weighted average number of common shares outstanding — basic (in shares) Weighted Average Number of Shares Outstanding, Basic Restricted share grants, less net settled shares Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Available amount under repurchase program Share Repurchase Program, Remaining Authorized, Amount Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Schedule of Earnings Per Share Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Segment Reporting [Abstract] Direct cost of revenues Cost of Revenue Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Other income (expense) Nonoperating Income (Expense) [Abstract] Entity Tax Identification Number Entity Tax Identification Number 2016 Stock Repurchase Program Two Thousand Sixteen Stock Repurchase Program [Member] Two thousand sixteen stock repurchase program. Write-offs Accounts Receivable, Allowance for Credit Loss, Writeoff Restructuring and Related Activities [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares issued (in shares) Beginning Balance (in shares) Ending Balance (in shares) Common Stock, Shares, Issued Weighted average remaining lease term (years), Operating leases Operating Lease, Weighted Average Remaining Lease Term Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Schedule of Changes in Carrying Amounts of Goodwill by Operating Segment Schedule of Goodwill [Table Text Block] Interest expense Interest expense Interest Expense, Nonoperating Trading Arrangement: Trading Arrangement [Axis] Income taxes Increase (Decrease) in Income Taxes Payable Total Shareholder Return Amount Total Shareholder Return Amount Cumulative translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Insider Trading Arrangements [Line Items] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Four Lessee, Operating Lease, Liability, to be Paid, after Year Four Unallocated Corporate Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Accounts receivable: Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] Non-cash additions to property and equipment Capital Expenditures Incurred but Not yet Paid Senior secured revolving line of credit Line of Credit Facility, Maximum Borrowing Capacity Accounts Receivable and Allowance for Expected Credit Losses Provision for Doubtful Accounts Disclosure [Text Block] Provision for Doubtful Accounts Disclosure [Text Block] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Statement [Line Items] Statement [Line Items] Variable Rate [Axis] Variable Rate [Axis] Consolidation Items [Axis] Consolidation Items [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Common Stock Common Stock [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Payment Guarantee Payment Guarantee [Member] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation