Investments (Schedule Of Unrealized Loss On Investments) (Details)	Mar. 31, 2021 USD ($) item	Dec. 31, 2020 USD ($) item
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 158,713,000	$ 60,918,000
Less than 12 months: Unrealized Losses	$ (5,339,000)	$ (405,000)
Less than 12 months: Count | item	173	67
12 months or more: Fair Value	$ 19,922,000	$ 22,032,000
12 months or more: Unrealized Losses	$ (213,000)	$ (296,000)
12 months or more: Count | item	32	35
Fair Value	$ 178,635,000	$ 82,950,000
Unrealized Losses	$ (5,552,000)	$ (701,000)
Count | item	205	102
U.S. Government And Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 9,832,000	$ 3,966,000
Less than 12 months: Unrealized Losses	$ (134,000)	$ (21,000)
Less than 12 months: Count | item	7	5
12 months or more: Fair Value	$ 7,629,000	$ 4,185,000
12 months or more: Unrealized Losses	$ (36,000)	$ (19,000)
12 months or more: Count | item	15	11
Fair Value	$ 17,461,000	$ 8,151,000
Unrealized Losses	$ (170,000)	$ (40,000)
Count | item	22	16
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 97,958,000	$ 27,022,000
Less than 12 months: Unrealized Losses	$ (4,132,000)	$ (219,000)
Less than 12 months: Count | item	107	28
Fair Value	$ 97,958,000	$ 27,022,000
Unrealized Losses	$ (4,132,000)	$ (219,000)
Count | item	107	28
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized Losses	$ (5,600,000)	$ (4,900,000)
Count | item	205
Corporate Securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 9,677,000	7,576,000
Less than 12 months: Unrealized Losses	$ (173,000)	$ (37,000)
Less than 12 months: Count | item	19	13
12 months or more: Fair Value	$ 2,806,000	$ 3,040,000
12 months or more: Unrealized Losses	$ (91,000)	$ (118,000)
12 months or more: Count | item	3	4
Fair Value	$ 12,483,000	$ 10,616,000
Unrealized Losses	$ (264,000)	$ (155,000)
Count | item	22	17
Agency Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 31,182,000	$ 18,390,000
Less than 12 months: Unrealized Losses	$ (809,000)	$ (101,000)
Less than 12 months: Count | item	32	17
12 months or more: Fair Value	$ 1,504,000	$ 3,355,000
12 months or more: Unrealized Losses	$ (6,000)	$ (6,000)
12 months or more: Count | item	3	5
Fair Value	$ 32,686,000	$ 21,745,000
Unrealized Losses	$ (815,000)	$ (107,000)
Count | item	35	22
Private-Label Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 6,828,000	$ 2,506,000
Less than 12 months: Unrealized Losses	$ (62,000)	$ (15,000)
Less than 12 months: Count | item	5	2
Fair Value	$ 6,828,000	$ 2,506,000
Unrealized Losses	$ (62,000)	$ (15,000)
Count | item	5	2
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months: Fair Value	$ 3,236,000	$ 1,458,000
Less than 12 months: Unrealized Losses	$ (29,000)	$ (12,000)
Less than 12 months: Count | item	3	2
12 months or more: Fair Value	$ 7,983,000	$ 11,452,000
12 months or more: Unrealized Losses	$ (80,000)	$ (153,000)
12 months or more: Count | item	11	15
Fair Value	$ 11,219,000	$ 12,910,000
Unrealized Losses	$ (109,000)	$ (165,000)
Count | item	14	17