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Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 10,993	$ 8,771	$ 5,772
Increase in tax positions for prior years	479	221	758
Decrease in tax positions for prior years	(535)	(1,550)	(569)
Decrease in tax positions for prior year settlement	(208)	0	(149)
Decrease in tax positions for prior years due to statutes lapsing	(26)	(164)	(103)
Increase in tax positions for current year	3,999	3,722	3,112
Change due to translation of foreign currencies	(48)	(7)	(50)
Ending balance	$ 14,654	$ 10,993	$ 8,771

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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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No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
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Amount of decrease in unrecognized tax benefits resulting from foreign currency translation.

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

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