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Investment Securities - Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	$ 94,071	$ 135,656
Available-for-sale, gross unrealized gains	540	174
Available-for-sale, gross unrealized losses	(595)	(3,343)
Investment securities available-for-sale, at fair value	94,016	132,487
Held-to-maturity, amortized cost	14,340	21,462
Held-to-maturity, gross unrealized gains	22
Held-to-maturity, gross unrealized losses	(56)	(610)
Held-to-maturity, estimated fair value	14,306	20,852
Residential Mortgage Backed Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	46,182	73,859
Available-for-sale, gross unrealized gains	372	113
Available-for-sale, gross unrealized losses	(209)	(1,517)
Investment securities available-for-sale, at fair value	46,345	72,455
Commercial Mortgage Backed Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	43,686	56,101
Available-for-sale, gross unrealized gains	73	10
Available-for-sale, gross unrealized losses	(386)	(1,822)
Investment securities available-for-sale, at fair value	43,373	54,289
Held-to-maturity, amortized cost	8,923	11,716
Held-to-maturity, gross unrealized gains	2
Held-to-maturity, gross unrealized losses	(46)	(349)
Held-to-maturity, estimated fair value	8,879	11,367
US States and Political Subdivisions Debt Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	4,123	5,617
Available-for-sale, gross unrealized gains	95	51
Available-for-sale, gross unrealized losses		(4)
Investment securities available-for-sale, at fair value	4,218	5,664
Held-to-maturity, amortized cost	1,093	1,720
Held-to-maturity, gross unrealized gains	15
Held-to-maturity, gross unrealized losses		(17)
Held-to-maturity, estimated fair value	1,108	1,703
US Treasury Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	80	79
Investment securities available-for-sale, at fair value	80	79
US Government Agencies Debt Securities [Member]
Schedule Of Investments [Line Items]
Held-to-maturity, amortized cost	4,324	8,026
Held-to-maturity, gross unrealized gains	5
Held-to-maturity, gross unrealized losses	(10)	(244)
Held-to-maturity, estimated fair value	$ 4,319	$ 7,782

X

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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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