Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of the differences between taxes on income (loss) before income taxes
Taxes (benefit) on U.S. and other international earnings (losses) at greater than the Bermuda rate	$ 23,395	$ 62,751	$ 54,060
Increase (decrease) in valuation allowance	8,276	(9,759)	32,869
Tax reserves and interest	26,266	861	1,107
State income taxes (benefit)	(2,316)	3,433	3,540
Total income tax expense (benefit)	$ 55,621	$ 57,286	$ 91,576
Effective tax rate (as a percent)	(11.40%)	(8.10%)	(15.50%)
Increase in tax expense attributable to a recorded liability for uncertain tax positions	$ 26,300
Office of the Tax Commissioner, Bermuda
Reconciliation of the differences between taxes on income (loss) before income taxes
Effective income tax rate	0.00%