Investment Securities (Amortized Cost and Estimated Fair Values of Investment Securities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	$ 109,684		$ 116,906
Available-for-sale, Pledged available-for-sale securities, Estimated Fair Value	9,894		4,159
Available-for-sale securities, Gross Unrealized Gains	386		1,339
Available-for-sale securities, Gross Unrealized Losses	3,375		1,263
Available-for-sale, at fair value	106,695		116,982
Held-to-maturity Securities, Amortized Cost	407,138		404,594
Held-to-maturity securities, Gross Unrealized Gains	47		418
Held-to-maturity securities, Gross Unrealized Losses	16,644		3,488
Held-to-maturity securities, Estimated Fair Value	390,541		401,524
Equity securities, at fair value	1,305		1,372
Fair value adjustment recorded through earnings	5,613	$ 3,998
Accounting Standards Update 2016-01 [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity securities, at fair value	1,300		1,400
Accounting Standards Update 2016-01 [Member] | Revision of Prior Period, Change in Accounting Principle, Adjustment [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value adjustment recorded through earnings	(70)	$ (18)
U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	22,495		22,932
Available-for-sale securities, Gross Unrealized Gains	5		7
Available-for-sale securities, Gross Unrealized Losses	1,245		634
Available-for-sale, at fair value	21,255		22,305
Held-to-maturity Securities, Amortized Cost	86,490		87,072
Held-to-maturity securities, Gross Unrealized Gains			20
Held-to-maturity securities, Gross Unrealized Losses	3,472		1,231
Held-to-maturity securities, Estimated Fair Value	83,018		85,861
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	1		2
Held-to-maturity securities, Estimated Fair Value	401		402
Mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	85,165		91,948
Available-for-sale securities, Gross Unrealized Gains	381		1,318
Available-for-sale securities, Gross Unrealized Losses	2,104		629
Available-for-sale, at fair value	83,442		92,637
Held-to-maturity Securities, Amortized Cost	305,741		302,604
Held-to-maturity securities, Gross Unrealized Gains	1		301
Held-to-maturity securities, Gross Unrealized Losses	13,116		2,248
Held-to-maturity securities, Estimated Fair Value	292,626		300,657
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	2,024		2,026
Available-for-sale securities, Gross Unrealized Gains			14
Available-for-sale securities, Gross Unrealized Losses	26
Available-for-sale, at fair value	1,998		2,040
Held-to-maturity Securities, Amortized Cost	14,507		14,518
Held-to-maturity securities, Gross Unrealized Gains	45		95
Held-to-maturity securities, Gross Unrealized Losses	56		9
Held-to-maturity securities, Estimated Fair Value	$ 14,496		$ 14,604