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Indebtedness Indebtedness (Schedule of Long-Term Debt) (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Schedule of Debt Instruments [Line Items]    
Long-term debt $ 504,676 $ 506,050
Unamortized Debt Issuance Costs 2,929  
Unamortized Debt Discount 6,113  
Finance Lease, Liability $ 3,718 5,450
Five Point Three Hundred Seventy Five Percent Senior Notes [Member]    
Schedule of Debt Instruments [Line Items]    
Interest Rate 5.375%  
Long-term Debt, Gross $ 300,000  
Unamortized Debt Issuance Costs 2,543  
Unamortized Debt Discount 5,576  
Long-term Debt $ 291,881 291,597
Three Point Zero Three Percent Borrowing From Federal Home Loan Bank Due December 16, 2026 [Member]    
Schedule of Debt Instruments [Line Items]    
Interest Rate 3.03%  
Long-term Debt, Gross $ 60,000  
Unamortized Debt Issuance Costs 0  
Unamortized Debt Discount 0  
Long-term Debt $ 60,000 60,000
Six Point Seventy Percent Senior Notes [Member]    
Schedule of Debt Instruments [Line Items]    
Interest Rate 6.70%  
Long-term Debt, Gross $ 100,000  
Unamortized Debt Issuance Costs 256  
Unamortized Debt Discount 458  
Long-term Debt $ 99,286 99,233
Seven Point Twenty Five Percent Senior Notes [Member]    
Schedule of Debt Instruments [Line Items]    
Interest Rate 7.25%  
Long-term Debt, Gross $ 50,000  
Unamortized Debt Issuance Costs 130  
Unamortized Debt Discount 79  
Long-term Debt 49,791 49,770
Finance lease obligation [Member]    
Schedule of Debt Instruments [Line Items]    
Finance Lease, Liability $ 3,718 $ 5,450