Summary of Significant Accounting Policies, Uncertain Tax Positions (Details) - Multiple Foreign and Domestic Authorities [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Gross balance at beginning of year	$ 11,456	$ 5,514	$ 5,290
Increases related to prior year tax positions	775	5,161	0
Decreases related to prior year tax positions	0	0	(277)
Increases related to current year tax positions	2,273	3,704	669
Settlements	0	(956)	(159)
Decreases due to lapse of statutes of limitations	(1,051)	(1,483)	(187)
Currency adjustments		(484)
Currency adjustments	54		178
Gross balance at end of year	13,507	11,456	5,514
Uncertain Tax Positions [Abstract]
Unrecognized tax benefits that would impact effective tax rate	13,500	11,400
Interest and penalties expenses/(benefits)	700	1,300	700
Accrued interest and penalties	3,600	$ 2,900	$ 1,600
Minimum [Member]
Uncertain Tax Positions [Abstract]
Estimated increase in gross unrecognized tax benefits within next 12 months	500
Maximum [Member]
Uncertain Tax Positions [Abstract]
Estimated increase in gross unrecognized tax benefits within next 12 months	$ 2,000
Statute of limitations related to income tax examinations	10 years