Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Income tax provision	$ 145,602	$ 119,383	$ 125,749
Actual income tax rates	27.50%	47.30%	27.90%
Income tax expense, foreign minimum tax	$ 100	$ 100	$ 100
Cash and cash equivalents	821,345	902,867
Deferred social security tax payment	51,000
Deferred social security tax payment, next fiscal year	51,000
Deferred tax liabilities, net	50,951	29,436
Valuation allowance for deferred tax assets	2,465	3,856
Other Noncurrent Liabilities
Operating Loss Carryforwards [Line Items]
Deferred tax liabilities, net	51,000	36,800
Other Assets
Operating Loss Carryforwards [Line Items]
Deferred tax liabilities, net		$ 7,400
Non-US [Member] | Subsidiaries [Member]
Operating Loss Carryforwards [Line Items]
Undistributed earnings of foreign subsidiaries	117,100
Cash and cash equivalents	$ 113,500