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Income Taxes - Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in unrecognized tax benefits
Balance at beginning of year	$ 12,369	$ 11,137	$ 8,269
Additions for tax positions related to current year	1,217	3,075	2,154
Additions for tax positions relating to prior years	47	21	1,721
Reductions for tax positions relating to prior years	(1,166)	(1,814)	(934)
Reductions due to the lapse of the applicable statute of limitations			(26)
Settlements	(104)	(50)	(47)
Balance at end of year	12,363	12,369	$ 11,137
Unrecognized tax benefits that would impact effective tax rate if recognized	1,400
Accrued interest and penalties related to unrecognized tax benefits	$ 400	$ 400

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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