Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net Income (Loss) Attributable to Parent	$ 62,987	$ (23,840)	$ 41,743
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	25,978	30,222	34,405
Noncash Operating Lease Expense	6,967	7,763	8,397
Impairment of Long-Lived Assets Held-for-use	0	13,217	805
Share-based compensation	25,857	24,081	24,213
Amortization of debt discount and issuance costs	794	793	8,264
Goodwill, Impairment Loss	0	59,816	0
Accounts Receivable, Credit Loss Expense (Reversal)	13	1,050	250
Deferred income taxes	12,480	(9,859)	8,795
(Gain) loss on sales of businesses, excluding transaction costs	(32,824)	1,603	0
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	(173)	0	1,506
Debt and Equity Securities, Unrealized Gain (Loss)	0	(1,667)	0
Other Noncash Income	(421)	(25)	(789)
Changes in operating assets and liabilities, net of acquisitions and divestitures:
(Increase) decrease in receivables from clients, net	(39,845)	33,051	(10,123)
(Increase) decrease in unbilled services, net	(38,820)	18,876	(10,269)
(Increase) decrease in current income tax receivable / payable, net	(2,723)	(3,662)	4,442
(Increase) decrease in other assets	(2,670)	(11,972)	(144)
Increase (decrease) in accounts payable and accrued liabilities	10,394	(7,786)	(6,884)
Increase (decrease) in accrued payroll and related benefits	(2,636)	(1,169)	30,339
Increase (decrease) in deferred revenues	(7,717)	6,246	282
Net cash provided by operating activities	17,987	136,738	132,220
Cash flows from investing activities:
Purchases of property and equipment	(10,871)	(8,125)	(13,240)
Investment in life insurance policies	(1,245)	(2,462)	(4,703)
Purchases of businesses, net of cash acquired	(44,819)	(8,701)	(2,500)
Payments to Acquire Investments	0	(13,000)	(5,000)
Capitalization of internally developed software	(4,889)	(8,272)	(10,312)
Proceeds from Sale of Property, Plant, and Equipment	408	25	753
Proceeds from Divestiture of Businesses, Net of Cash Divested	41,273	(1,499)	0
Net cash used in investing activities	(20,143)	(42,034)	(35,002)
Cash flows from financing activities:
Proceeds from exercises of stock options	804	1,003	1,244
Shares redeemed for employee tax withholdings	(10,103)	(7,903)	(5,382)
Share repurchases	(64,612)	(27,141)	(12,985)
Proceeds from bank borrowings	235,000	283,000	347,000
Repayments of bank borrowings	(205,499)	(288,574)	(192,515)
Repayments of Convertible Debt	0	0	(250,000)
Payments for debt issuance costs	0	0	(1,524)
Payment for Contingent Consideration Liability, Financing Activities	0	0	4,674
Net cash used in financing activities	(44,410)	(39,615)	(118,836)
Effect of exchange rate changes on cash	170	484	115
Net increase (decrease) in cash and cash equivalents	(46,396)	55,573	(21,503)
Cash and cash equivalents at beginning of the period	67,177	11,604	33,107
Cash and cash equivalents at end of the period	20,781	67,177	11,604
Non-cash investing and financing activities:
Property and equipment expenditures and capitalized software included in accounts payable, accrued expenses and accrued payroll and related benefits	4,733	1,178	2,600
Contingent consideration related to purchases of businesses	1,800	1,770	0
Common stock issued related to purchase of business	3,323	0	0
Share Repurchases Initiated but not yet Settled	191	0	1,234
Cash paid during the year for:
Interest	7,976	8,309	7,971
Income taxes	$ 8,449	$ 4,721	$ 1,429