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Indebtedness (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2005
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   506,050 $ 550,743  
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 expires Dec.20, 2022 [Member]        
Line of credit borrowing capacity   50,000    
Line of credit, maximum borrowing capacity   125,000    
Acceleration of principal   $ 20,000    
Maximum borrowing percentage   10.00%    
One Point Sixty One Percent Borrowing From Federal Home Loan Bank Due July 21, 2021 [Member]        
Long-term Debt, Gross   $ 25,000    
Interest Rate   1.61%    
One Point Fifty Six Percent Borrowing From Federal Home Loan Bank Due August 16, 2021 [Member]        
Long-term Debt, Gross   $ 25,000    
Interest Rate   1.56%    
Federal Home Loan Bank of Indianapolis [Member]        
Aggregate investment in FHLBI   $ 5,700 5,700  
Federal Home Loan Bank of New York [Member]        
Aggregate investment in FHLBI   $ 800 $ 3,100