Consolidated Condensed Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Product revenues	$ 260,715	$ 266,005	$ 528,372	$ 554,540
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Cost of sales	$ 201,338	$ 186,792	$ 404,882	$ 387,658
Gross margin	59,377	79,213	123,490	166,882
Operating expenses:
Net research and development expenses	19,325	18,227	39,759	35,830
Selling, general and administrative expenses	31,943	27,223	61,251	55,749
Restructuring expenses	374	2,091	555	2,882
Total operating expenses	51,642	47,541	101,565	94,461
Operating income	7,735	31,672	21,925	72,421
Interest expense, net	(1,430)	(630)	(1,999)	(1,669)
Foreign currency gain (loss)	4,552	(515)	6,769	258
Other income	134	12	338	3
Earnings before income tax	10,991	30,539	27,033	71,013
Income tax expense	3,919	5,748	8,214	13,313
Net income	$ 7,072	$ 24,791	$ 18,819	$ 57,700
Basic earnings per share	$ 0.21	$ 0.75	$ 0.57	$ 1.75
Diluted earnings per share	$ 0.21	$ 0.74	$ 0.56	$ 1.72
Weighted average number of shares – basic	33,119,085	33,100,230	33,077,029	33,025,432
Weighted average number of shares – diluted	33,426,123	33,544,208	33,421,987	33,468,849