Summary of Significant Accounting Policies, Uncertain Tax Positions (Details) - Multiple Foreign and Domestic Authorities [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Gross balance at beginning of year	$ 13,507	$ 11,456	$ 5,514
Increases related to prior year tax positions	2,958	775	5,161
Increases related to current year tax positions	3,302	2,273	3,704
Settlements	(1,091)	0	(956)
Decreases due to lapse of statutes of limitations	(1,377)	(1,051)	(1,483)
Currency adjustments			(484)
Currency adjustments	321	54
Gross balance at end of year	17,620	13,507	11,456
Uncertain Tax Positions [Abstract]
Unrecognized tax benefits that would impact effective tax rate	17,600	13,500
Interest and penalties expenses/(benefits)	1,500	700	1,300
Accrued interest and penalties	5,100	$ 3,600	$ 2,900
Minimum [Member]
Uncertain Tax Positions [Abstract]
Estimated decrease in gross unrecognized tax benefits within next 12 months	2,500
Maximum [Member]
Uncertain Tax Positions [Abstract]
Estimated decrease in gross unrecognized tax benefits within next 12 months	$ 3,500
Statute of limitations related to income tax examinations	10 years