Income Taxes - Components of Deferred Income Tax Amounts (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred income tax assets
Employee deferred compensation and other benefit obligations	$ 189,407	$ 162,803
Deferred revenues, foreign royalties and management fees	72	375
Credits and net operating loss carryforwards	31,337	28,137
Stock-based compensation	7,440	6,318
Allowance for credit losses	5,909	6,825
Workers’ compensation	2,467	3,052
Operating lease liabilities	43,230	48,358
Other	17,010	17,698
Total deferred income tax assets	296,872	273,566
Deferred income tax liabilities
Amortization of intangible assets	(20,816)	(20,162)
Property and equipment basis differences	(757)	(8,612)
Unrealized gains from investments held in employee deferred compensation trusts	(43,709)	(27,131)
Right-of-use assets	(35,213)	(38,837)
Other	(12,230)	(13,258)
Total deferred income tax liabilities	(112,725)	(108,000)
Valuation allowance	(26,417)	(25,772)
Total deferred income tax assets, net	$ 157,730	$ 139,794