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Investments (Schedule Of Unrealized Loss On Investments) (Details)
$ in Thousands
Sep. 30, 2023
USD ($)
security
Dec. 31, 2022
USD ($)
security
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months: Fair Value $ 59,228 $ 208,157
Less than 12 months: Unrealized Losses $ (1,414) $ (16,459)
Less than 12 months: Count | security 54 309
12 months or more: Fair Value $ 389,687 $ 266,690
12 months or more: Unrealized Losses $ (65,926) $ (45,072)
12 months or more: Count | security 524 282
Fair Value $ 448,915 $ 474,847
Unrealized Losses $ (67,340) $ (61,531)
Count | security 578 591
U.S Treasury [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months: Fair Value   $ 17,598
Less than 12 months: Unrealized Losses   $ (183)
Less than 12 months: Count | security   3
12 months or more: Fair Value $ 71,141 $ 72,659
12 months or more: Unrealized Losses $ (12,531) $ (11,540)
12 months or more: Count | security 28 28
Fair Value $ 71,141 $ 90,257
Unrealized Losses $ (12,531) $ (11,723)
Count | security 28 31
Municipal [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months: Fair Value $ 810 $ 73,644
Less than 12 months: Unrealized Losses $ (193) $ (9,586)
Less than 12 months: Count | security 2 90
12 months or more: Fair Value $ 127,907 $ 80,503
12 months or more: Unrealized Losses $ (32,749) $ (20,980)
12 months or more: Count | security 166 104
Fair Value $ 128,717 $ 154,147
Unrealized Losses $ (32,942) $ (30,566)
Count | security 168 194
Corporate [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months: Fair Value $ 1,483 $ 12,221
Less than 12 months: Unrealized Losses $ (167) $ (851)
Less than 12 months: Count | security 5 25
12 months or more: Fair Value $ 21,500 $ 10,368
12 months or more: Unrealized Losses $ (3,181) $ (1,226)
12 months or more: Count | security 46 21
Fair Value $ 22,983 $ 22,589
Unrealized Losses $ (3,348) $ (2,077)
Count | security 51 46
Agency Mortgage-Backed & Asset-Backed [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months: Fair Value $ 7,716 $ 55,393
Less than 12 months: Unrealized Losses $ (195) $ (2,747)
Less than 12 months: Count | security 22 139
12 months or more: Fair Value $ 120,909 $ 88,953
12 months or more: Unrealized Losses $ (12,615) $ (9,611)
12 months or more: Count | security 228 113
Fair Value $ 128,625 $ 144,346
Unrealized Losses $ (12,810) $ (12,358)
Count | security 250 252
Non-Agency Mortgage & Asset-Backed [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months: Fair Value $ 49,219 $ 49,301
Less than 12 months: Unrealized Losses $ (859) $ (3,092)
Less than 12 months: Count | security 25 52
12 months or more: Fair Value $ 48,230 $ 14,207
12 months or more: Unrealized Losses $ (4,850) $ (1,715)
12 months or more: Count | security 56 16
Fair Value $ 97,449 $ 63,508
Unrealized Losses $ (5,709) $ (4,807)
Count | security 81 68