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Basis of Presentation - Schedule of Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2021
Jun. 30, 2022
Jun. 30, 2021
SUPPLEMENTAL CASH FLOW INFORMATION:      
Interest paid   $ 3,938 $ 4,000
Income taxes paid, including foreign withholding taxes   4,363 4,793
Non-cash investing and financing activities:      
Dividend payable $ 10,741 10,380 10,794
Accrued debt issuance costs   1,233 0
Right-of-use assets obtained in exchange of operating lease liabilities   417 0
Non-cash acquisition of patents $ 30,100 30,100 0
Non-cash distribution of patents   1,928 0
Accrued capitalized patent costs and property and equipment purchases   $ 3,634 $ 3,561