Income Taxes (Details 6) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Unrecognized tax benefits that would impact tax rate	$ 9,156	$ 8,919	$ 11,594
Increase (decrease) in unrecognized tax benefits due to:
Balance at January 1	8,919	11,594	9,209
Tax positions taken during prior periods	550	11	649
Tax positions taken during the current period	649	1,114	367
Acquisition	0	0	2,516
Settlements	0	(1,351)	0
Lapse of the applicable statute of limitations	(900)	(2,344)	(1,290)
Foreign currency translation	(62)	(105)
Foreign currency translation			143
Balance at December 31	9,156	8,919	11,594
Interest and penalties	(196)	(206)	370
The liability for unrecognized tax benefits included accrued interest	$ 3,675	$ 3,906	$ 4,169

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The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from foreign currency translation.

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Amount of increase in unrecognized tax benefits resulting from acquisitions.

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Amount of interest expense accrued for an underpayment of income taxes.

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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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