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Indebtedness Indebtedness (Schedule of Long-Term Debt) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Schedule of Debt Instruments [Line Items]    
Long-term debt $ 506,050 $ 550,743
Unamortized Debt Issuance Costs 3,167  
Unamortized Debt Discount 6,233  
Finance Lease, Liability $ 5,450 508
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 2,733  
Unamortized Debt Discount 5,670  
Long-term Debt $ 291,597 291,307
Five Point Eight Hundred Seventy Five Percent Senior Notes [Member]    
Schedule of Debt Instruments [Line Items]    
Interest Rate 5.875%  
Long-term Debt, Gross $ 185,000  
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
One Point Fifty Six Percent Borrowing From Federal Home Loan Bank Due August 16, 2021 [Member]    
Schedule of Debt Instruments [Line Items]    
Interest Rate 1.56%  
Long-term Debt, Gross $ 25,000  
Unamortized Debt Issuance Costs 0  
Unamortized Debt Discount 0  
Long-term Debt $ 0 25,000
One Point Sixty One Percent Borrowing From Federal Home Loan Bank Due July 21, 2021 [Member]    
Schedule of Debt Instruments [Line Items]    
Interest Rate 1.61%  
Long-term Debt, Gross $ 25,000  
Unamortized Debt Issuance Costs 0  
Unamortized Debt Discount 0  
Long-term Debt $ 0 25,000
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 287  
Unamortized Debt Discount 480  
Long-term Debt $ 99,233 99,180
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 147  
Unamortized Debt Discount 83  
Long-term Debt 49,770 49,748
Finance lease obligation [Member]    
Schedule of Debt Instruments [Line Items]    
Finance Lease, Liability $ 5,450 $ 508