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Background and Basis of Presentation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
SUPPLEMENTAL CASH FLOW INFORMATION:      
Interest paid $ 18,623 $ 13,429 $ 8,000
Income taxes paid, including foreign withholding taxes 59,202 6,805 23,091
Non-cash investing and financing activities:      
Dividend payable 10,226 10,384 10,741
Accrued debt issuance costs 0 100 0
Accrued taxes on the repurchase of common stock 3,170 0 0
Non-cash acquisition of patents 0 30,100 0
Non-cash distribution of patents 0 1,928 0
Right-of-use assets obtained in exchange of operating lease liabilities 93 6,644 739
Accrued capitalized patent costs and property and equipment $ 670 $ 4,026 $ 2,021