Schedule II - Valuation and Qualifying Accounts (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Reductions credited to income tax expense	$ (803)
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Allowance, Beginning Balance	3,592	$ 4,366	$ 10,223
Additions charged to income tax expense	743	953	546
Reductions charged to other comprehensive income	24	(7)	(15)
Reductions credited to income tax expense	(600)	(1,683)	(6,064)
Changes due to foreign currency translation	(2)	(37)	(324)
Allowance, Ending Balance	$ 3,757	$ 3,592	$ 4,366