Investment Securities (Amortized Cost and Fair Value of Investment Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item]
Securities available for sale, Amortized Cost	$ 1,200,699	$ 1,184,835
Securities available for sale, Unrealized Gains	529	8,446
Securities available for sale, Unrealized Losses	81,866	14,766
Securities available for sale	1,119,362	1,178,515
Securities held to maturity, Amortized Cost	211,179	205,586
Securities held to maturity, Unrealized Gains	332	4,683
Securities held to maturity, Unrealized Losses	5,144	449
Securities held to maturity, fair value	206,367	209,820
Allowance for credit losses, Amortized Cost	(6)	(5)
Held-to-maturity securities, net , Amortized Cost	211,173	205,581
U.S. Government Agency And Government Sponsored Enterprises [Member]
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item]
Securities available for sale, Amortized Cost	30,798	15,793
Securities available for sale, Unrealized Gains	23	195
Securities available for sale, Unrealized Losses	1,516	97
Securities available for sale	29,305	15,891
State And Political Subdivisions [Member]
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item]
Securities held to maturity, Amortized Cost	123,474	111,399
Securities held to maturity, Unrealized Gains	231	2,412
Securities held to maturity, Unrealized Losses	2,841	300
Securities held to maturity, fair value	120,864	113,511
Collateralized Mortgage Obligations [Member] \| Federal National Mortgage Association [Member]
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item]
Securities available for sale, Amortized Cost	14,068	15,346
Securities available for sale, Unrealized Gains	0	26
Securities available for sale, Unrealized Losses	1,265	433
Securities available for sale	12,803	14,939
Securities held to maturity, Amortized Cost	17,754	19,485
Securities held to maturity, Unrealized Gains	14	368
Securities held to maturity, Unrealized Losses	436	3
Securities held to maturity, fair value	17,332	19,850
Collateralized Mortgage Obligations [Member] \| Federal Home Loan Mortgage Corporation [Member]
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item]
Securities available for sale, Amortized Cost	23,722	25,257
Securities available for sale, Unrealized Losses	1,959	477
Securities available for sale	21,763	24,780
Securities held to maturity, Amortized Cost	21,805	23,840
Securities held to maturity, Unrealized Gains	6	565
Securities held to maturity, Unrealized Losses	436
Securities held to maturity, fair value	21,375	24,405
Collateralized Mortgage Obligations [Member] \| Government National Mortgage Association [Member]
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item]
Securities held to maturity, Amortized Cost	5,056	5,481
Securities held to maturity, Unrealized Gains	1	84
Securities held to maturity, Unrealized Losses	143
Securities held to maturity, fair value	4,914	5,565
Collateralized Mortgage Obligations [Member] \| Privately Issued [Member]
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item]
Securities available for sale, Unrealized Gains	391	410
Securities available for sale	391	410
Mortgage-Backed Securities [Member]
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item]
Securities available for sale, Amortized Cost	1,169,901	1,169,042
Securities available for sale, Unrealized Gains	506	8,251
Securities available for sale, Unrealized Losses	80,350	14,669
Securities available for sale	1,090,057	1,162,624
Securities held to maturity, Amortized Cost	87,705	94,187
Securities held to maturity, Unrealized Gains	101	2,271
Securities held to maturity, Unrealized Losses	2,303	149
Securities held to maturity, fair value	85,503	96,309
Mortgage-Backed Securities [Member] \| Federal National Mortgage Association [Member]
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item]
Securities available for sale, Amortized Cost	580,465	576,163
Securities available for sale, Unrealized Gains	22	6,565
Securities available for sale, Unrealized Losses	35,300	5,242
Securities available for sale	545,187	577,486
Securities held to maturity, Amortized Cost	8,910	9,275
Securities held to maturity, Unrealized Gains	45	411
Securities held to maturity, Unrealized Losses	110
Securities held to maturity, fair value	8,845	9,686
Mortgage-Backed Securities [Member] \| Federal Home Loan Mortgage Corporation [Member]
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item]
Securities available for sale, Amortized Cost	432,427	430,010
Securities available for sale, Unrealized Gains	86	952
Securities available for sale, Unrealized Losses	34,210	6,435
Securities available for sale	398,303	424,527
Securities held to maturity, Amortized Cost	8,345	8,706
Securities held to maturity, Unrealized Gains	0	137
Securities held to maturity, Unrealized Losses	670	144
Securities held to maturity, fair value	7,675	8,699
Mortgage-Backed Securities [Member] \| Government National Mortgage Association [Member]
Schedule of Debt Securities Available For Sale and Held To Maturity Securities [Line Item]
Securities available for sale, Amortized Cost	119,219	122,266
Securities available for sale, Unrealized Gains	7	298
Securities available for sale, Unrealized Losses	7,616	2,082
Securities available for sale	111,610	120,482
Securities held to maturity, Amortized Cost	25,835	27,400
Securities held to maturity, Unrealized Gains	35	706
Securities held to maturity, Unrealized Losses	508	2
Securities held to maturity, fair value	$ 25,362	$ 28,104

Allowance for credit losses, amortized cost.

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Debt securities available for sale and held to maturity securities.

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Held-to-maturity securities, net.

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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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Amount, before tax, of unrealized loss 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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Amortized cost of 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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Amount of 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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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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