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Investments (Unrealized Gain (Loss) On Investments) (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 540,006,000	$ 384,369,000
Gross unrealized gains	9,247,000	13,272,000
Gross unrealized losses	(3,465,000)	(701,000)
Fair value	545,788,000	396,940,000
U.S. Government And Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	89,813,000	12,594,000
Gross unrealized gains	126,000	20,000
Gross unrealized losses	(293,000)	(40,000)
Fair value	89,646,000	12,574,000
Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	226,582,000	236,253,000
Gross unrealized gains	7,184,000	11,020,000
Gross unrealized losses	(1,490,000)	(219,000)
Fair value	232,276,000	247,054,000
Corporate [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	24,786,000	20,421,000
Gross unrealized gains	311,000	22,000
Gross unrealized losses	(141,000)	(155,000)
Fair value	24,956,000	20,288,000
Agency Mortgage-Backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	126,238,000	70,443,000
Gross unrealized gains	1,217,000	1,905,000
Gross unrealized losses	(1,338,000)	(107,000)
Fair value	126,117,000	72,241,000
Private-Label Mortgage-Backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	27,073,000	8,412,000
Gross unrealized gains	50,000	56,000
Gross unrealized losses	(74,000)	(15,000)
Fair value	27,049,000	8,453,000
Asset-Backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	45,514,000	36,246,000
Gross unrealized gains	359,000	249,000
Gross unrealized losses	(129,000)	(165,000)
Fair value	$ 45,744,000	$ 36,330,000

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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