Consolidated Statements of Earnings and Other Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues and reimbursable expenses:
Revenue from Contract with Customer, Including Assessed Tax	$ 905,640	$ 844,127	$ 876,757
Reimbursable Revenues	21,318	26,887	88,717
Total revenues and reimbursable expenses	926,958	871,014	965,474
Direct costs and reimbursable expenses (exclusive of depreciation and amortization shown in operating expenses):
Direct costs	636,776	592,428	575,602
Amortization of intangible assets and software development costs	3,803	5,366	5,375
Reimbursable expenses	21,369	26,918	88,696
Total direct costs and reimbursable expenses	661,948	624,712	669,673
Operating expenses and other operating gains:
Selling, general and administrative expenses	177,886	170,686	203,071
Restructuring charges (1)	12,401	20,525	1,855
Litigation and other losses (gains)	198	(150)	(1,196)
Depreciation and amortization	21,686	24,277	28,365
Goodwill, Impairment Loss	0	59,816	0
Total operating expenses and other losses (gains), net	212,171	275,154	232,095
Operating income (loss)	52,839	(28,852)	63,706
Other income (expense), net
Interest Expense Net Of Interest Income	(8,150)	(9,292)	(15,648)
Other Nonoperating Income (Expense)	35,347	4,271	4,433
Nonoperating Income (Expense)	27,197	(5,021)	(11,215)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	80,036	(33,873)	52,491
Income tax expense (benefit)	17,049	(10,155)	10,512
Net income (loss) from continuing operations	62,987	(23,718)	41,979
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	(122)	(236)
Net income (loss)	$ 62,987	$ (23,840)	$ 41,743
Net earnings per basic share:
Net income from continuing operations, per basic share (in USD per share)	$ 2.94	$ (1.08)	$ 1.91
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share	0	(0.01)	(0.01)
Net income, per basic share (in USD per share)	2.94	(1.09)	1.90
Net earnings per diluted share:
Net income from continuing operations, per diluted share (in USD per share)	2.89	(1.08)	1.87
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	0	(0.01)	(0.02)
Net income, per diluted share (in USD per share)	$ 2.89	$ (1.09)	$ 1.85
Weighted average shares used in calculating earnings per share:
Basic (shares)	21,439	21,882	21,993
Diluted (shares)	21,809	21,882	22,507
Comprehensive income (loss):
Net income (loss)	$ 62,987	$ (23,840)	$ 41,743
Foreign currency translation adjustments, net of tax	(925)	348	99
Unrealized gain (loss) on investment, net of tax	1,169	1,323	(702)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	3,535	(3,546)	(956)
Other comprehensive income (loss)	3,779	(1,875)	(1,559)
Comprehensive income (loss)	$ 66,766	$ (25,715)	$ 40,184