Income Taxes - Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred Tax Assets
Allowance for expected credit losses	$ 1,648	$ 1,213
Accrued paid time off	3,525	3,039
State net operating loss carry forward	456	500
Stock based compensation	6,076	5,523
Deferred compensation	6,568	5,765
Foreign tax credits	8,151	8,035
State tax credits	1,923	686
Foreign exchange	4,345	3,591
Foreign deferred	333	441
Accrued bonus	6,393	5,830
Capital loss	1,020	1,054
Facilities impairment	2,611	3,092
Capitalized research expenses	70,617	47,019
Depreciation	402	0
Accrued liabilities and other	1,364	2,682
Lease liabilities	54,263	58,538
Deferred Tax Assets, gross, before valuation allowance	169,695	147,008
Less: Valuation Allowance	(9,627)	(9,021)	$ (7,607)	$ (7,048)
Total Deferred Tax Assets	160,068	137,987
Deferred Tax Liabilities
Payroll taxes	(939)	(725)
Unbilled revenue	(184)	(284)
Depreciation	0	(2,128)
Amortization	(108,009)	(107,201)
Deferred gain and other	(2,543)	(2,202)
Lease assets - right-of-use	(46,790)	(51,622)
Total Deferred Tax Liabilities	(158,465)	(164,162)
Total Net Deferred Tax (Liabilities)		$ (26,175)
Total Net Deferred Tax Assets	$ 1,603