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Investment Securities - Securities in Continuous Unrealized Loss Position (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Investments [Line Items]
Available-for-sale, less than 12 months, fair value	$ 82,923,000	$ 15,041,000
Available-for-sale, less than 12 months, unrealized losses	(731,000)	(3,000)
Available-for-sale, 12 months or more, fair value	3,417,000	4,346,000
Available-for-sale, 12 months or more, unrealized losses	(39,000)	(148,000)
Held-to-maturity, less than 12 months, fair value		412,000
Held-to-maturity, less than 12 months, unrealized losses	0
Residential Mortgage Backed Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, less than 12 months, fair value	31,346,000	2,334,000
Available-for-sale, less than 12 months, unrealized losses	(240,000)	(1,000)
Available-for-sale, 12 months or more, fair value	253,000	1,019,000
Available-for-sale, 12 months or more, unrealized losses	(2,000)	(7,000)
Commercial Mortgage Backed Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, less than 12 months, fair value	2,245,000	2,630,000
Available-for-sale, less than 12 months, unrealized losses	(12,000)	(1,000)
Available-for-sale, 12 months or more, fair value	2,970,000	3,327,000
Available-for-sale, 12 months or more, unrealized losses	(35,000)	(141,000)
Held-to-maturity, less than 12 months, fair value		412,000
US Government Agencies Debt Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, less than 12 months, fair value	4,987,000
Available-for-sale, less than 12 months, unrealized losses	(13,000)
Available-for-sale, 12 months or more, fair value	194,000
Available-for-sale, 12 months or more, unrealized losses	(2,000)
US States and Political Subdivisions Debt Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, less than 12 months, fair value	561,000
Available-for-sale, less than 12 months, unrealized losses	(10,000)
Corporate Note Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, less than 12 months, fair value	9,092,000
Available-for-sale, less than 12 months, unrealized losses	(52,000)
US Treasury Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, less than 12 months, fair value	34,692,000	10,077,000
Available-for-sale, less than 12 months, unrealized losses	$ (404,000)	$ (1,000)

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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