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Indebtedness (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2005
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2004
Maximum borrowing percentage   10.00%      
Borrowing threshold of FHLBI   20      
Debt Issuance Costs, Gross   $ 3,300      
Long-term debt   504,676 $ 506,050    
Five Point Three Hundred Seventy Five Percent Senior Notes [Member]          
Long-term Debt, Gross   $ 300,000      
Interest Rate   5.375%      
Discount for notes issued   $ 5,900      
Net proceeds from the issuance   290,800      
Five Point Eight Hundred Seventy Five Percent Senior Notes [Member]          
Long-term Debt, Gross   $ 185,000      
Interest Rate   5.875%      
Debt Retirement Costs Before Tax   $ 4,200      
Debt Retirement Costs Net of Tax   3,300      
Proceeds From Debt Issuance After Redemption   106,000      
Three Point Zero Three Percent Borrowing From Federal Home Loan Bank Due December 16, 2026 [Member]          
Long-term Debt, Gross   $ 60,000      
Interest Rate   3.03%      
Federal Home Loan Bank Advances     45,000    
Net proceeds from the issuance     15,000    
Six Point Seventy Percent Senior Notes due 2035 [Member]          
Long-term Debt, Gross   $ 100,000      
Interest Rate   6.70%      
Acceleration of principal   $ 10,000      
Discount for notes issued $ 700        
Effective yield 6.754%        
Net proceeds from the issuance $ 50,000        
Seven Point Twenty Five Percent Senior Notes due 2034 [Member]          
Long-term Debt, Gross   $ 50,000      
Interest Rate   7.25%      
Acceleration of principal   $ 10,000      
Discount for notes issued         $ 100
Effective yield         7.27%
Bond proceeds to Insurance Subsidiaries as capital         $ 25,000
Line of Credit [Member]          
Line of credit borrowing capacity   50,000   $ 50,000  
Line of credit, maximum borrowing capacity   125,000   $ 125,000  
Acceleration of principal   $ 30,000      
Maximum borrowing percentage   10.00%      
Zero Point Seventy Percent Borrowing from FHLBNY Due June 27, 2022. [Member]          
Federal Home Loan Bank Advances   $ 35,000      
Federal Home Loan Bank, Advances, Interest Rate   0.70%      
One Point One Percent Borrowing From Federal Home Loan Bank Due June 27, 2022 [Member]          
Federal Home Loan Bank, Advances, Interest Rate   1.10%      
Three Point Twenty One Percent Borrowing from Federal Home Loan Bank Due November 3, 2022.          
Federal Home Loan Bank Advances     $ 25,000    
Federal Home Loan Bank, Advances, Interest Rate     3.21%    
Federal Home Loan Bank of Indianapolis [Member]          
Aggregate investment in FHLBI   $ 5,200 $ 5,700