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Consolidated Condensed Statements of Income - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Income Statement [Abstract]        
Product revenues $ 371,512 $ 366,195 $ 1,103,210 $ 1,102,143
Type of Revenue [Extensible List] us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember
Cost of sales $ 276,639 $ 279,985 $ 822,883 $ 846,815
Gross margin 94,873 86,210 280,327 255,328
Operating expenses:        
Net research and development expenses 23,013 23,150 67,619 72,991
Selling, general and administrative expenses 36,861 38,220 116,992 113,680
Restructuring expenses, net 2,662 1,099 12,342 3,412
Impairment of goodwill       19,509
Total operating expenses 62,536 62,469 196,953 209,592
Operating income 32,337 23,741 83,374 45,736
Interest expense, net (4,710) (3,368) (11,956) (9,444)
Foreign currency (loss) gain (8,480) 2,107 (6,213) 384
Other income 263 272 952 1,058
Earnings before income tax 19,410 22,752 66,157 37,734
Income tax expense 3,445 6,908 16,531 15,478
Net income $ 15,965 $ 15,844 $ 49,626 $ 22,256
Basic earnings per share $ 0.51 $ 0.48 $ 1.58 $ 0.67
Diluted earnings per share $ 0.51 $ 0.48 $ 1.57 $ 0.67
Weighted average number of shares – basic 31,186,867 32,944,386 31,420,826 33,049,097
Weighted average number of shares – diluted 31,365,049 33,196,000 31,605,202 33,310,601