Investment Securities (Amortized Cost and Estimated Fair Values of Investment Securities) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	$ 99,804		$ 116,906
Available-for-sale securities, Gross Unrealized Gains	11		1,339
Available-for-sale securities, Gross Unrealized Losses	13,468		1,263
Available-for-sale, at fair value	86,347		116,982
Held-to-maturity Securities, Amortized Cost	570,719		404,594
Held-to-maturity securities, Gross Unrealized Gains			418
Held-to-maturity securities, Gross Unrealized Losses	69,574		3,488
Held-to-maturity securities, Estimated Fair Value	501,145		401,524
Equity securities, at fair value	1,222		1,372
Fair value adjustment recorded through earnings	22,769	$ 12,645
Accounting Standards Update 2016-01 [Member]
Schedule of Available-for-sale Securities [Line Items]
Equity securities, at fair value	1,200		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	(145)	$ (24)
U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	22,065		22,932
Available-for-sale securities, Gross Unrealized Gains	8		7
Available-for-sale securities, Gross Unrealized Losses	3,759		634
Available-for-sale, at fair value	18,314		22,305
Held-to-maturity Securities, Amortized Cost	148,207		87,072
Held-to-maturity securities, Gross Unrealized Gains			20
Held-to-maturity securities, Gross Unrealized Losses	13,861		1,231
Held-to-maturity securities, Estimated Fair Value	134,346		85,861
States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	807		400
Held-to-maturity securities, Gross Unrealized Gains			2
Held-to-maturity securities, Gross Unrealized Losses	24
Held-to-maturity securities, Estimated Fair Value	783		402
Mortgage-backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	75,719		91,948
Available-for-sale securities, Gross Unrealized Gains	3		1,318
Available-for-sale securities, Gross Unrealized Losses	9,566		629
Available-for-sale, at fair value	66,156		92,637
Held-to-maturity Securities, Amortized Cost	410,705		302,604
Held-to-maturity securities, Gross Unrealized Gains			301
Held-to-maturity securities, Gross Unrealized Losses	55,042		2,248
Held-to-maturity securities, Estimated Fair Value	355,663		300,657
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	2,020		2,026
Available-for-sale securities, Gross Unrealized Gains			14
Available-for-sale securities, Gross Unrealized Losses	143
Available-for-sale, at fair value	1,877		2,040
Held-to-maturity Securities, Amortized Cost	11,000		14,518
Held-to-maturity securities, Gross Unrealized Gains			95
Held-to-maturity securities, Gross Unrealized Losses	647		9
Held-to-maturity securities, Estimated Fair Value	$ 10,353		$ 14,604