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Investments (Unrealized Gain (Loss) On Investments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]    
Amortized cost $ 525,528 $ 548,333
Gross unrealized gains 88 34
Gross unrealized losses (67,340) (61,531)
Fair value 458,276 486,836
U.S Treasury [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized cost 83,672 101,980
Gross unrealized losses (12,531) (11,723)
Fair value 71,141 90,257
Municipal [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized cost 161,659 186,007
Gross unrealized gains   14
Gross unrealized losses (32,942) (30,566)
Fair value 128,717 155,455
Corporate [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized cost 26,331 26,316
Gross unrealized losses (3,348) (2,077)
Fair value 22,983 24,239
Agency Mortgage-Backed & Asset-Backed [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized cost 147,099 163,274
Gross unrealized gains 81 19
Gross unrealized losses (12,810) (12,358)
Fair value 134,370 150,935
Non-Agency Mortgage & Asset-Backed [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized cost 106,767 70,756
Gross unrealized gains 7 1
Gross unrealized losses (5,709) (4,807)
Fair value $ 101,065 $ 65,950