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Income Taxes - Reconciliation of Statutory Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Tax at statutory rate	$ 2,928	$ 466	$ 9,118
State income taxes, net of federal income tax benefit	3,942	(401)	6,725
Impact of Discrete Tax Items, GILTI Inclusion	390	(105)	1,003
Changes in uncertain tax positions	877	164	(1,288)
Change in valuation allowances	(119)	135	1,415
Rate changes	5,209	4,274	1,054
Foreign withholding taxes	0	0	(6,651)
Foreign tax rate differential	(4)	165	217
Foreign tax credits	(759)	(56,359)	0
Research and development tax credits	(620)	(717)	(32)
Other, net	303	313	738
Total	$ 12,147	$ (52,065)	$ 12,299

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Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to Tax Cuts and Jobs Act.

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