Income Taxes - Reconciliation of Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of expected income tax expense to actual income tax expense
Computed “expected” tax expense (benefit)	$ 30,787	$ (45,582)	$ (6,049)
Tax-exempt income	(1,298)	(976)	(1,528)
Tax credits	(13,160)	(17,876)	(21,933)
Non-U.S. operating results	(1,322)	(1,307)	(1,447)
Tax deficiency (excess tax benefit) on share-based compensation	286	457	99
Tax rate differential on loss carryback	0	(7,758)	(3,400)
Goodwill impairment	0	31,413	0
Non-taxable gain on bargain purchase	(15,626)	0	0
Provision-to-return and other differences	3,574	1,217	3,595
Change in uncertain tax positions	(1,909)	(1,674)	1,956
State income taxes	460	(561)	(376)
Benefit from amended returns	0	0	(550)
Other	691	1,318	(175)
Total income tax expense (benefit)	$ 2,483	$ (41,329)	$ (29,808)