Investments (Unrealized Gain (Loss) On Investments) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 502,645,000	$ 384,369,000
Gross unrealized gains	11,487,000	13,272,000
Gross unrealized losses	(1,885,000)	(701,000)
Fair Value	512,247,000	396,940,000
U.S. Government And Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	79,377,000	12,594,000
Gross unrealized gains	358,000	20,000
Gross unrealized losses	(17,000)	(40,000)
Fair Value	79,718,000	12,574,000
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	219,690,000	236,253,000
Gross unrealized gains	8,724,000	11,020,000
Gross unrealized losses	(1,146,000)	(219,000)
Fair Value	227,268,000	247,054,000
Corporate Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	24,275,000	20,421,000
Gross unrealized gains	295,000	22,000
Gross unrealized losses	(159,000)	(155,000)
Fair Value	24,411,000	20,288,000
Agency Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	115,849,000	70,443,000
Gross unrealized gains	1,694,000	1,905,000
Gross unrealized losses	(420,000)	(107,000)
Fair Value	117,123,000	72,241,000
Private-Label Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	20,087,000	8,412,000
Gross unrealized gains	35,000	56,000
Gross unrealized losses	(60,000)	(15,000)
Fair Value	20,062,000	8,453,000
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	43,367,000	36,246,000
Gross unrealized gains	381,000	249,000
Gross unrealized losses	(83,000)	(165,000)
Fair Value	$ 43,665,000	$ 36,330,000