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Summary of Significant Accounting Policies Cost of Customer Relationships Acquired (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Number of years of available premiums 50 years      
Number of Years-Cost of Customer Relationship Acquired Amortization 5 years      
Cost of customer relationships acquired $ 10,611 $ 11,541 $ 13,455 $ 15,225
Amortization (1,206) (1,816) (1,546)  
Present Value of Future Insurance Profits, Unrealized Gain (Loss) on Investment 276 $ (98) $ (224)  
2022 846      
2023 762      
2024 693      
2025 633      
2026 577      
Thereafter 7,308      
Intangible Assets Arising from Insurance Contracts Acquired in Business Combination, Amortization Expense 10,819      
Effects of unrealized (gains) losses on CCRA $ (208)      
Customer Relationships [Member] | Minimum [Member]        
Interest Accrual Rate Associated with Amortization Method of Present Value of Future Insurance Profits 3.70%      
Customer Relationships [Member] | Maximum [Member]        
Interest Accrual Rate Associated with Amortization Method of Present Value of Future Insurance Profits 8.50%