Income Taxes, Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets [Abstract]
Inventory differences	$ 6,181	$ 5,040
Foreign tax credit and other foreign benefits	57,720	69,820
Stock-based compensation	8,925	7,441
Accrued expenses not deductible until paid	42,694	35,374
Foreign currency exchange	1,403	163
Net operating losses	8,667	6,341
Capitalized research and development	23,019	18,716
R&D credit carryforward	1,229	881
Other	45	37
Gross deferred tax assets	149,883	143,813
Deferred Tax Liabilities [Abstract]
Foreign currency exchange	0	721
Foreign withholding taxes	20,207	20,986
Intangibles step-up	4,623	4,958
Overhead allocation to inventory	2,684	3,611
Amortization of intangibles	18,551	15,393
Other	1,690	1,063
Gross deferred tax liabilities	47,755	46,732
Valuation allowance	(67,340)	(77,042)
Deferred taxes, net	34,788	$ 20,039
Tax Credit Carryforwards [Abstract]
Valuation allowance on foreign tax credit carryforward, interest expense limitation, and R&D credit carryforward	$ 58,900
Minimum [Member]
Tax Credit Carryforwards [Abstract]
Expiration date	Dec. 31, 2026
Maximum [Member]
Tax Credit Carryforwards [Abstract]
Expiration date	Dec. 31, 2030
Foreign [Member]
Operating Loss Carryforwards [Abstract]
Operating loss carryforwards	$ 26,400
Operating loss carryforwards subject to expiration	11,400
Operating loss carryforwards not subject to expiration	15,000
Valuation allowance on operating loss carryforwards	24,700
Tax effected valuation allowance on operating loss carryforwards	$ 8,400
Foreign [Member] | Minimum [Member]
Operating Loss Carryforwards [Abstract]
Expiration date	Dec. 31, 2021
Foreign [Member] | Maximum [Member]
Operating Loss Carryforwards [Abstract]
Expiration date	Dec. 31, 2030