Income Taxes - Difference Between Total Tax Expense and Amount Computed by Applying Statutory Federal Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Statutory rate applied to income	$ 252,073	$ 79,667	$ 180,449
Plus state income taxes, net of Federal tax benefit	34,599	28,658	27,030
Taxation of foreign operations, net	2,299	(9,072)	(17,663)
U.S. tax reform - transition tax	0	0	4,492
Non-deductible goodwill impairment tax effect	0	106,411	0
Valuation allowance	(2,486)	1,995	4,503
Other	(1,961)	(731)	7,782
Income tax expense, total	301,556	215,973	212,808
Foreign Tax Authority
Income Tax Contingency [Line Items]
Foreign rate change - deferred tax remeasurement	$ 17,032	$ 9,045	$ 6,215