Income Taxes - Components of income tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current expense (benefit):
United States	$ 195,588	$ 284,274	$ 181,571
Non-U.S.	5,628	11,259	16,091
Current Income Tax Expense (Benefit)	201,216	295,533	197,662
Deferred expense (benefit):
United States	(96,599)	(123,261)	(89,170)
Non-U.S.	(24,656)	(43,690)	3,346
Deferred Income Tax Expense (Benefit)	(121,255)	(166,951)	(85,824)
Income tax expense (benefit)	$ 79,961	$ 128,582	$ 111,838