Income Taxes - Uncertain Tax Positions - Tabular Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	$ 7,050	$ 6,761	$ 6,240
Decrease in unrecognized tax benefits taken in prior periods	(28)	(183)	(308)
Increase in Unrecognized Tax Benefits Taken in Current Period	1,935	2,023	2,347
Decrease in Unrecognized Tax Benefits Due to Lapse of Statute of Limitations	(1,029)	(1,292)	(2,116)
Increase in unrecognized tax benefits due to acquisition	11,301	0	0
(Decrease) Due to Foreign Exchange Rates	(132)	(259)
Increase Due to Foreign Exchange Rates			598
Unrecognized Tax Benefits, Ending Balance	$ 19,097	$ 7,050	$ 6,761

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

No definition available.

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Amount of unrecognized tax benefits.

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