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Investment Securities (Amortized Cost and Fair Value of Investment Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities And Available-for-sale Securities [Line Items]
Amortized cost: Total available-for-sale debt securities	$ 195,313	$ 180,557
Gross unrealized gains: Available-for-sale debt securities	8,671	4,698
Gross unrealized losses: Available-for-sale debt securities		(138)
Fair value: Available-for-sale debt securities	203,984	185,117
Agency - GSE [Member]
Schedule of Held-to-maturity Securities And Available-for-sale Securities [Line Items]
Amortized cost: Total available-for-sale debt securities	5,945	5,941
Gross unrealized gains: Available-for-sale debt securities	411	218
Fair value: Available-for-sale debt securities	6,356	6,159
Obligations Of States And Political Subdivisions [Member]
Schedule of Held-to-maturity Securities And Available-for-sale Securities [Line Items]
Amortized cost: Total available-for-sale debt securities	52,813	51,857
Gross unrealized gains: Available-for-sale debt securities	3,441	2,871
Gross unrealized losses: Available-for-sale debt securities		(10)
Fair value: Available-for-sale debt securities	56,254	54,718
MBS - GSE Residential [Member]
Schedule of Held-to-maturity Securities And Available-for-sale Securities [Line Items]
Amortized cost: Total available-for-sale debt securities	136,555	122,759
Gross unrealized gains: Available-for-sale debt securities	4,819	1,609
Gross unrealized losses: Available-for-sale debt securities		(128)
Fair value: Available-for-sale debt securities	$ 141,374	$ 124,240

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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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