Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns
Balance at beginning of year	$ 48,413	$ 42,394
Change in tax positions of prior years	0	8,166
Change in tax positions of current year	0	0
Reduction in tax positions for statute expirations	(514)	(1,510)
Reduction in tax positions for audit settlements	0	(637)
Balance at end of year	$ 47,899	$ 48,413