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Income Taxes - Summary of Activity Related to Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Summary of activity related to uncertain tax positions:
Beginning Balance	$ 3,699	$ 1,896	$ 1,701
Additions Based on Tax Positions Related to the Current Year	26	103	128
Additions for Tax Positions of Prior Years	220	1,957	595
Prior Year Reductions	(108)	(32)	(85)
Statute Expirations	(1,053)	(225)	(160)
Settlements	(36)	0	(283)
Ending Balance	$ 2,748	$ 3,699	$ 1,896

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of unrecognized tax benefits.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period 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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