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Investments (Schedule Of Unrealized Loss On Investments) (Details)
$ in Thousands
Dec. 31, 2022
USD ($)
security
Dec. 31, 2021
USD ($)
security
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months: Fair Value $ 208,157 $ 236,472
Less than 12 months: Unrealized Losses $ (16,459) $ (3,624)
Less than 12 months: Count | security 309 187
12 months or more: Fair Value $ 266,690 $ 35,053
12 months or more: Unrealized Losses $ (45,072) $ (1,042)
12 months or more: Count | security 282 40
Fair Value $ 474,847 $ 271,525
Unrealized Losses $ (61,531) $ (4,666)
Count | security 591 227
US Treasury Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months: Fair Value $ 17,598 $ 76,383
Less than 12 months: Unrealized Losses $ (183) $ (698)
Less than 12 months: Count | security 3 21
12 months or more: Fair Value $ 72,659  
12 months or more: Unrealized Losses $ (11,540)  
12 months or more: Count | security 28  
Fair Value $ 90,257 $ 76,383
Unrealized Losses $ (11,723) $ (698)
Count | security 31 21
Municipal [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months: Fair Value $ 73,644 $ 38,997
Less than 12 months: Unrealized Losses $ (9,586) $ (910)
Less than 12 months: Count | security 90 44
12 months or more: Fair Value $ 80,503 $ 15,404
12 months or more: Unrealized Losses $ (20,981) $ (512)
12 months or more: Count | security 104 16
Fair Value $ 154,147 $ 54,401
Unrealized Losses $ (30,566) $ (1,422)
Count | security 194 60
Corporate [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months: Fair Value $ 12,221 $ 8,954
Less than 12 months: Unrealized Losses $ (851) $ (132)
Less than 12 months: Count | security 25 17
12 months or more: Fair Value $ 10,368 $ 1,694
12 months or more: Unrealized Losses $ (1,226) $ (56)
12 months or more: Count | security 21 3
Fair Value $ 22,589 $ 10,648
Unrealized Losses $ (2,077) $ (188)
Count | security 46 20
Agency mortgage & asset-backed [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months: Fair Value $ 55,393 $ 96,923
Less than 12 months: Unrealized Losses $ (2,747) $ (1,669)
Less than 12 months: Count | security 139 94
12 months or more: Fair Value $ 88,953 $ 15,991
12 months or more: Unrealized Losses $ (9,611) $ (417)
12 months or more: Count | security 113 18
Fair Value $ 144,346 $ 112,914
Unrealized Losses $ (12,358) $ (2,086)
Count | security 252 112
Non-Agency mortgage & asset-backed [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Less than 12 months: Fair Value $ 49,301 $ 15,215
Less than 12 months: Unrealized Losses $ (3,092) $ (215)
Less than 12 months: Count | security 52 11
12 months or more: Fair Value $ 14,207 $ 1,964
12 months or more: Unrealized Losses $ (1,715) $ (57)
12 months or more: Count | security 16 3
Fair Value $ 63,508 $ 17,179
Unrealized Losses $ (4,807) $ (272)
Count | security 68 14