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Corporate Borrowings -Schedule of Outstanding Indebtedness (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Nov. 16, 2021
Debt Instrument [Line Items]      
Total indebtedness outstanding $ 296,050 $ 293,850  
Less unamortized loan fees (6,082) (6,601)  
Total indebtedness outstanding, net 289,968 287,249  
Less current maturities of long-term debt (6,400) (6,400)  
Long-term debt 283,568 280,849  
Credit Agreement - Revolver, 6.00% (variable rate) due 2026 | Line of Credit | Revolving Credit Facility      
Debt Instrument [Line Items]      
Total indebtedness outstanding $ 70,000 63,000  
Credit agreement, interest rate 6.00%    
Convertible Senior Notes, 1.88% (fixed rate) due 2041 | Convertible Debt      
Debt Instrument [Line Items]      
Total indebtedness outstanding $ 201,250 201,250  
Stated interest rate 1.88%   1.88%
Series A Senior Secured Notes, 3.53% (fixed rate) due 2027 | Secured Debt      
Debt Instrument [Line Items]      
Total indebtedness outstanding $ 9,600 12,000  
Stated interest rate 3.53%    
Senior Secured Notes, 3.80% (fixed rate) due 2029 | Secured Debt      
Debt Instrument [Line Items]      
Total indebtedness outstanding $ 15,200 $ 17,600  
Stated interest rate 3.80%