Investments (Schedule Of Unrealized Loss On Investments) (Details) $ in Thousands	Jun. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 403,440	$ 236,472
Less than 12 months: Unrealized Losses	$ (35,520)	$ (3,624)
Less than 12 months: Count | security	465	187
12 months or more: Fair Value	$ 76,023	$ 35,053
12 months or more: Unrealized Losses	$ (9,288)	$ (1,042)
12 months or more: Count | security	88	40
Fair Value	$ 479,463	$ 271,525
Unrealized Losses	$ (44,808)	$ (4,666)
Count | security	553	227
U.S Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 84,069	$ 76,383
Less than 12 months: Unrealized Losses	$ (8,396)	$ (698)
Less than 12 months: Count | security	30	21
Fair Value	$ 84,069	$ 76,383
Unrealized Losses	$ (8,396)	$ (698)
Count | security	30	21
Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 150,546	$ 38,997
Less than 12 months: Unrealized Losses	$ (19,055)	$ (910)
Less than 12 months: Count | security	180	44
12 months or more: Fair Value	$ 16,765	$ 15,404
12 months or more: Unrealized Losses	$ (4,408)	$ (512)
12 months or more: Count | security	21	16
Fair Value	$ 167,311	$ 54,401
Unrealized Losses	$ (23,463)	$ (1,422)
Count | security	201	60
Corporate [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 17,733	$ 8,954
Less than 12 months: Unrealized Losses	$ (773)	$ (132)
Less than 12 months: Count | security	35	17
12 months or more: Fair Value	$ 3,791	$ 1,694
12 months or more: Unrealized Losses	$ (209)	$ (56)
12 months or more: Count | security	7	3
Fair Value	$ 21,524	$ 10,648
Unrealized Losses	$ (982)	$ (188)
Count | security	42	20
Agency Mortgage-Backed & asset-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 104,881	$ 96,923
Less than 12 months: Unrealized Losses	$ (5,120)	$ (1,669)
Less than 12 months: Count | security	176	94
12 months or more: Fair Value	$ 50,711	$ 15,991
12 months or more: Unrealized Losses	$ (4,429)	$ (417)
12 months or more: Count | security	54	18
Fair Value	$ 155,592	$ 112,914
Unrealized Losses	$ (9,549)	$ (2,086)
Count | security	230	112
Non-Agency mortgage & asset-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 46,211	$ 15,215
Less than 12 months: Unrealized Losses	$ (2,176)	$ (215)
Less than 12 months: Count | security	44	11
12 months or more: Fair Value	$ 4,756	$ 1,964
12 months or more: Unrealized Losses	$ (242)	$ (57)
12 months or more: Count | security	6	3
Fair Value	$ 50,967	$ 17,179
Unrealized Losses	$ (2,418)	$ (272)
Count | security	50	14