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Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balances $ 350,693 $ 195,019
Other comprehensive income (loss) (2,228) (782)
Balances 351,864 196,104
Accumulated Other Comprehensive Income (loss) [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balances 56 1,529
Other comprehensive income (loss) (2,228) (782)
Balances (2,172) 747
Accumulated Net Unrealized Investment Gain (Loss) [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balances 56 1,529
Other comprehensive income (loss) (2,228) (782)
Balances $ (2,172) $ 747