Investment Securities (Amortized Cost and Estimated Fair Values of Investment Securities) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	$ 104,811		$ 137,465
Available-for-sale, Pledged available-for-sale securities, Estimated Fair Value	3,189		3,626
Available-for-sale securities, Gross Unrealized Gains	1,638		2,254
Available-for-sale securities, Gross Unrealized Losses	1,324		151
Available-for-sale, at fair value	105,125		139,568
Held-to-maturity Securities, Amortized Cost	250,501		65,706
Held-to-maturity securities, Gross Unrealized Gains	197		185
Held-to-maturity securities, Gross Unrealized Losses	2,863		63
Held-to-maturity securities, Estimated Fair Value	247,835		65,828
Equity securities, at fair value	1,384		1,395
Accounting Standards Update 2016-01
Schedule of Available-for-sale Securities [Line Items]
Equity securities, at fair value	1,400		1,400
Accounting Standards Update 2016-01 | Revision of Prior Period, Change in Accounting Principle, Adjustment [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value adjustment recorded through earnings	(24)	$ 34
U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	18,557		23,600
Available-for-sale securities, Gross Unrealized Gains	4		20
Available-for-sale securities, Gross Unrealized Losses	578		83
Available-for-sale, at fair value	17,983		23,537
Held-to-maturity Securities, Amortized Cost	67,772		18,893
Held-to-maturity securities, Gross Unrealized Gains	26		38
Held-to-maturity securities, Gross Unrealized Losses	556		43
Held-to-maturity securities, Estimated Fair Value	67,242		18,888
States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	400		400
Held-to-maturity securities, Gross Unrealized Gains	2		1
Held-to-maturity securities, Estimated Fair Value	402		401
Mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	86,254		113,865
Available-for-sale securities, Gross Unrealized Gains	1,634		2,234
Available-for-sale securities, Gross Unrealized Losses	746		68
Available-for-sale, at fair value	87,142		116,031
Held-to-maturity Securities, Amortized Cost	169,802		27,347
Held-to-maturity securities, Gross Unrealized Gains	36		7
Held-to-maturity securities, Gross Unrealized Losses	2,302		18
Held-to-maturity securities, Estimated Fair Value	167,536		27,336
Other debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	12,527		19,066
Held-to-maturity securities, Gross Unrealized Gains	133		139
Held-to-maturity securities, Gross Unrealized Losses	5		2
Held-to-maturity securities, Estimated Fair Value	$ 12,655		$ 19,203