Allowance for Credit Losses and Unfunded Commitments and Letters of Credit (Analysis of Credit Quality of Loan Portfolio) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	$ 2,238,749	$ 2,745,438
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,372,896	1,490,732
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	1,214,862	1,201,138
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	990,350	854,212
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	642,813	798,466
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	1,838,767	1,751,150
Revolving Loans, Amortized Cost Basis	2,279,248	1,748,587
Revolving Loans Converted to Term Loans, Amortized Cost Basis	33,288	52,214
Total loans, net of unearned income	11,610,973	10,641,937
Allowance for Credit Loss	158,438	155,578	$ 149,140	$ 83,968
Total loans, net	11,452,535	10,486,359
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	1,184,152	1,074,864
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,016,940	766,442
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	657,730	715,378
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	634,115	507,656
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	398,969	545,313
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	1,369,118	1,289,984
Revolving Loans, Amortized Cost Basis	79,210	75,783
Revolving Loans Converted to Term Loans, Amortized Cost Basis	12,551	5,843
Total loans, net of unearned income	5,352,785	4,981,263
Allowance for Credit Loss	54,856	61,254	68,934	20,340
Commercial Real Estate | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	1,182,136	1,068,493
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,009,480	760,545
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	636,056	650,593
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	588,494	492,348
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	394,552	515,233
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	1,295,185	1,180,115
Revolving Loans, Amortized Cost Basis	75,487	74,754
Revolving Loans Converted to Term Loans, Amortized Cost Basis	12,551	3,644
Total loans, net of unearned income	5,193,941	4,745,725
Commercial Real Estate | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	1,698	2,252
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	1,357	19,016
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	15,199	6,196
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	1,513	163
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	13,590	27,270
Revolving Loans, Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans, Amortized Cost Basis	0	2,199
Total loans, net of unearned income	33,357	57,096
Commercial Real Estate | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	318	4,119
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	7,460	5,897
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	20,317	45,769
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	30,422	9,112
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	2,904	29,917
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	60,343	82,599
Revolving Loans, Amortized Cost Basis	3,723	1,029
Revolving Loans Converted to Term Loans, Amortized Cost Basis	0	0
Total loans, net of unearned income	125,487	178,442
Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	525,460	896,907
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	668,295	430,749
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	340,754	305,313
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	230,698	246,418
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	179,613	165,036
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	275,681	259,869
Revolving Loans, Amortized Cost Basis	1,513,357	1,081,668
Revolving Loans Converted to Term Loans, Amortized Cost Basis	16,706	37,308
Total loans, net of unearned income	3,750,564	3,423,268
Allowance for Credit Loss	57,836	54,712	45,250	30,292
Commercial Business | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	521,615	891,957
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	658,452	426,004
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	337,927	280,823
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	208,199	217,605
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	159,105	144,363
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	247,086	232,356
Revolving Loans, Amortized Cost Basis	1,456,332	1,028,616
Revolving Loans Converted to Term Loans, Amortized Cost Basis	9,736	35,411
Total loans, net of unearned income	3,598,452	3,257,135
Commercial Business | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	1,129	621
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	3,681	135
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	617	6,097
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	6,335	747
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	187	105
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	193	51
Revolving Loans, Amortized Cost Basis	17,988	34,256
Revolving Loans Converted to Term Loans, Amortized Cost Basis	74	236
Total loans, net of unearned income	30,204	42,248
Commercial Business | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	2,716	4,329
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	6,162	4,610
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	2,210	18,393
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	16,164	28,066
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	20,321	20,568
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	28,402	27,462
Revolving Loans, Amortized Cost Basis	39,037	18,796
Revolving Loans Converted to Term Loans, Amortized Cost Basis	6,896	1,661
Total loans, net of unearned income	121,908	123,885
Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	146,938	147,723
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	121,477	95,681
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	70,725	84,251
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	70,873	31,355
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	20,590	51,590
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	97,549	81,526
Revolving Loans, Amortized Cost Basis	319,406	296,263
Revolving Loans Converted to Term Loans, Amortized Cost Basis	1,345	7,326
Total loans, net of unearned income	848,903	795,715
Allowance for Credit Loss	9,071	8,148	9,052	15,835
Agriculture | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	141,623	147,561
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	119,538	87,964
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	68,621	74,658
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	67,689	29,739
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	20,570	46,058
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	91,411	79,693
Revolving Loans, Amortized Cost Basis	301,607	266,573
Revolving Loans Converted to Term Loans, Amortized Cost Basis	1,345	5,448
Total loans, net of unearned income	812,404	737,694
Agriculture | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	3,890	162
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	659	0
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	0	445
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	198	0
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	33	0
Revolving Loans, Amortized Cost Basis	598	565
Revolving Loans Converted to Term Loans, Amortized Cost Basis	0	0
Total loans, net of unearned income	5,378	1,172
Agriculture | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	1,425	0
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,280	7,717
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	2,104	9,148
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	2,986	1,616
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	20	5,532
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	6,105	1,833
Revolving Loans, Amortized Cost Basis	17,201	29,125
Revolving Loans Converted to Term Loans, Amortized Cost Basis	0	1,878
Total loans, net of unearned income	31,121	56,849
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	220,558	228,661
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	209,206	53,880
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	20,334	37,543
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	16,046	3,183
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	2,880	3,285
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	3,241	2,438
Revolving Loans, Amortized Cost Basis	67,559	55,765
Revolving Loans Converted to Term Loans, Amortized Cost Basis	1,037	0
Total loans, net of unearned income	540,861	384,755
Allowance for Credit Loss	13,142	5,397	7,636	8,571
Construction | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	220,558	228,661
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	208,472	53,880
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	20,334	35,795
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	14,329	3,183
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	2,437	3,285
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	3,192	2,189
Revolving Loans, Amortized Cost Basis	67,559	55,765
Revolving Loans Converted to Term Loans, Amortized Cost Basis	1,037	0
Total loans, net of unearned income	537,918	382,758
Construction | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	0
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	734
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	0
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	0
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	0
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	0
Revolving Loans, Amortized Cost Basis	0
Revolving Loans Converted to Term Loans, Amortized Cost Basis	0
Total loans, net of unearned income	734
Construction | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	0	0
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	0	1,748
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	1,717	0
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	443	0
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	49	249
Revolving Loans, Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans, Amortized Cost Basis	0	0
Total loans, net of unearned income	2,209	1,997
Real estate: One-to-four family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	156,406	390,238
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	354,364	141,269
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	124,150	56,703
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	37,799	52,111
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	39,552	32,681
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	85,335	116,043
Revolving Loans, Amortized Cost Basis	278,440	223,232
Revolving Loans Converted to Term Loans, Amortized Cost Basis	1,448	1,631
Total loans, net of unearned income	1,077,494	1,013,908
Allowance for Credit Loss	22,355	24,123	16,875	7,435
Real estate: One-to-four family residential | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	156,406	390,153
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	354,364	140,799
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	124,150	56,520
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	37,546	51,549
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	39,054	32,447
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	84,403	111,307
Revolving Loans, Amortized Cost Basis	277,930	222,747
Revolving Loans Converted to Term Loans, Amortized Cost Basis	1,288	1,347
Total loans, net of unearned income	1,075,141	1,006,869
Real estate: One-to-four family residential | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	0	85
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	470
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	0	183
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	253	562
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	498	234
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	932	4,736
Revolving Loans, Amortized Cost Basis	510	485
Revolving Loans Converted to Term Loans, Amortized Cost Basis	160	284
Total loans, net of unearned income	2,353	7,039
Consumer Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	5,235	7,045
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,614	2,711
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	1,169	1,950
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	819	13,489
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	1,209	561
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	7,843	1,290
Revolving Loans, Amortized Cost Basis	21,276	15,876
Revolving Loans Converted to Term Loans, Amortized Cost Basis	201	106
Total loans, net of unearned income	40,366	43,028
Allowance for Credit Loss	1,178	1,944	$ 1,393	$ 883
Consumer Loan | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	5,235	7,045
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,614	2,711
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	1,169	1,950
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	819	13,489
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	1,209	560
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	7,833	1,277
Revolving Loans, Amortized Cost Basis	21,276	15,853
Revolving Loans Converted to Term Loans, Amortized Cost Basis	201	97
Total loans, net of unearned income	40,356	42,982
Consumer Loan | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	0	0
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	0	1
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	10	13
Revolving Loans, Amortized Cost Basis	0	23
Revolving Loans Converted to Term Loans, Amortized Cost Basis	0	9
Total loans, net of unearned income	$ 10	$ 46