Investments (Schedule Of Unrealized Loss On Investments) (Details) $ in Thousands	Sep. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 277,785	$ 236,472
Less than 12 months: Unrealized Losses	$ (31,605)	$ (3,624)
Less than 12 months: Count | security	414	187
12 months or more: Fair Value	$ 197,570	$ 35,053
12 months or more: Unrealized Losses	$ (33,421)	$ (1,042)
12 months or more: Count | security	185	40
Fair Value	$ 475,355	$ 271,525
Unrealized Losses	$ (65,026)	$ (4,666)
Count | security	599	227
U.S Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 16,836	$ 76,383
Less than 12 months: Unrealized Losses	$ (1,864)	$ (698)
Less than 12 months: Count | security	11	21
12 months or more: Fair Value	$ 63,073
12 months or more: Unrealized Losses	$ (10,532)
12 months or more: Count | security	19
Fair Value	$ 79,909	$ 76,383
Unrealized Losses	$ (12,396)	$ (698)
Count | security	30	21
Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 132,404	$ 38,997
Less than 12 months: Unrealized Losses	$ (22,568)	$ (910)
Less than 12 months: Count | security	167	44
12 months or more: Fair Value	$ 34,527	$ 15,404
12 months or more: Unrealized Losses	$ (11,565)	$ (512)
12 months or more: Count | security	49	16
Fair Value	$ 166,931	$ 54,401
Unrealized Losses	$ (34,133)	$ (1,422)
Count | security	216	60
Corporate [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 15,560	$ 8,954
Less than 12 months: Unrealized Losses	$ (1,053)	$ (132)
Less than 12 months: Count | security	31	17
12 months or more: Fair Value	$ 7,412	$ 1,694
12 months or more: Unrealized Losses	$ (636)	$ (56)
12 months or more: Count | security	15	3
Fair Value	$ 22,972	$ 10,648
Unrealized Losses	$ (1,689)	$ (188)
Count | security	46	20
Agency Mortgage-Backed & asset-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 67,183	$ 96,923
Less than 12 months: Unrealized Losses	$ (3,158)	$ (1,669)
Less than 12 months: Count | security	158	94
12 months or more: Fair Value	$ 80,796	$ 15,991
12 months or more: Unrealized Losses	$ (9,397)	$ (417)
12 months or more: Count | security	89	18
Fair Value	$ 147,979	$ 112,914
Unrealized Losses	$ (12,555)	$ (2,086)
Count | security	247	112
Non-Agency mortgage & asset-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 45,802	$ 15,215
Less than 12 months: Unrealized Losses	$ (2,962)	$ (215)
Less than 12 months: Count | security	47	11
12 months or more: Fair Value	$ 11,762	$ 1,964
12 months or more: Unrealized Losses	$ (1,291)	$ (57)
12 months or more: Count | security	13	3
Fair Value	$ 57,564	$ 17,179
Unrealized Losses	$ (4,253)	$ (272)
Count | security	60	14