Allowance for Credit Losses and Unfunded Commitments and Letters of Credit (Analysis of Credit Quality of Loan Portfolio) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	$ 2,745,438	$ 2,223,383
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,490,732	1,379,336
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	1,201,138	985,423
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	854,212	875,545
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	798,466	812,034
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	1,751,150	1,413,553
Revolving Loans, Amortized Cost Basis	1,748,587	1,687,345
Revolving Loans Converted to Term Loans, Amortized Cost Basis	52,214	51,041
Total loans, net of unearned income	10,641,937	9,427,660
Allowance for Credit Loss	155,578	149,140	$ 83,968	$ 83,369
Total loans, net	10,486,359	9,278,520
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	1,074,864	680,708
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	766,442	709,562
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	715,378	513,737
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	507,656	547,996
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	545,313	498,904
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	1,289,984	1,038,233
Revolving Loans, Amortized Cost Basis	75,783	55,443
Revolving Loans Converted to Term Loans, Amortized Cost Basis	5,843	17,730
Total loans, net of unearned income	4,981,263	4,062,313
Allowance for Credit Loss	61,254	68,934	20,340	14,864
Commercial Real Estate | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	1,068,493	674,444
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	760,545	645,328
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	650,593	478,881
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	492,348	502,112
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	515,233	408,972
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	1,180,115	946,980
Revolving Loans, Amortized Cost Basis	74,754	52,049
Revolving Loans Converted to Term Loans, Amortized Cost Basis	3,644	11,332
Total loans, net of unearned income	4,745,725	3,720,098
Commercial Real Estate | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	2,252	3,348
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	39,374
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	19,016	21,285
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	6,196	30,232
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	163	46,197
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	27,270	50,115
Revolving Loans, Amortized Cost Basis	0	5
Revolving Loans Converted to Term Loans, Amortized Cost Basis	2,199	2,139
Total loans, net of unearned income	57,096	192,695
Commercial Real Estate | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	4,119	2,916
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	5,897	24,860
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	45,769	13,571
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	9,112	15,652
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	29,917	43,735
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	82,599	41,138
Revolving Loans, Amortized Cost Basis	1,029	3,389
Revolving Loans Converted to Term Loans, Amortized Cost Basis	0	4,259
Total loans, net of unearned income	178,442	149,520
Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	896,907	1,094,027
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	430,749	400,172
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	305,313	343,892
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	246,418	229,497
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	165,036	231,713
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	259,869	229,070
Revolving Loans, Amortized Cost Basis	1,081,668	1,055,285
Revolving Loans Converted to Term Loans, Amortized Cost Basis	37,308	14,312
Total loans, net of unearned income	3,423,268	3,597,968
Allowance for Credit Loss	54,712	45,250	30,292	34,658
Commercial Business | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	891,957	1,087,400
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	426,004	366,435
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	280,823	324,360
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	217,605	199,010
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	144,363	218,313
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	232,356	214,677
Revolving Loans, Amortized Cost Basis	1,028,616	1,000,725
Revolving Loans Converted to Term Loans, Amortized Cost Basis	35,411	11,540
Total loans, net of unearned income	3,257,135	3,422,460
Commercial Business | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	621	3,002
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	135	26,361
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	6,097	8,471
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	747	24,582
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	105	7,004
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	51	10,650
Revolving Loans, Amortized Cost Basis	34,256	22,426
Revolving Loans Converted to Term Loans, Amortized Cost Basis	236	0
Total loans, net of unearned income	42,248	102,496
Commercial Business | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	4,329	3,625
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	4,610	7,376
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	18,393	11,061
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	28,066	5,905
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	20,568	6,396
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	27,462	3,743
Revolving Loans, Amortized Cost Basis	18,796	32,134
Revolving Loans Converted to Term Loans, Amortized Cost Basis	1,661	2,772
Total loans, net of unearned income	123,885	73,012
Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	147,723	147,356
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	95,681	103,182
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	84,251	50,587
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	31,355	62,657
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	51,590	59,177
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	81,526	62,898
Revolving Loans, Amortized Cost Basis	296,263	283,000
Revolving Loans Converted to Term Loans, Amortized Cost Basis	7,326	10,770
Total loans, net of unearned income	795,715	779,627
Allowance for Credit Loss	8,148	9,052	15,835	9,589
Agriculture | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	147,561	142,163
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	87,964	90,612
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	74,658	44,434
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	29,739	58,366
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	46,058	58,893
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	79,693	59,396
Revolving Loans, Amortized Cost Basis	266,573	244,135
Revolving Loans Converted to Term Loans, Amortized Cost Basis	5,448	9,299
Total loans, net of unearned income	737,694	707,298
Agriculture | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	162	0
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	90
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	445	285
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	0	33
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	0	0
Revolving Loans, Amortized Cost Basis	565	85
Revolving Loans Converted to Term Loans, Amortized Cost Basis	0	13
Total loans, net of unearned income	1,172	506
Agriculture | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	0	5,193
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	7,717	12,480
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	9,148	5,868
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	1,616	4,258
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	5,532	284
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	1,833	3,502
Revolving Loans, Amortized Cost Basis	29,125	38,780
Revolving Loans Converted to Term Loans, Amortized Cost Basis	1,878	1,458
Total loans, net of unearned income	56,849	71,823
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	228,661	134,693
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	53,880	84,706
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	37,543	10,066
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	3,183	3,498
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	3,285	763
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	2,438	1,861
Revolving Loans, Amortized Cost Basis	55,765	29,323
Revolving Loans Converted to Term Loans, Amortized Cost Basis	0	3,753
Total loans, net of unearned income	384,755	268,663
Allowance for Credit Loss	5,397	7,636	8,571	14,395
Construction | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	228,661	134,693
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	53,880	66,974
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	35,795	10,066
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	3,183	3,498
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	3,285	763
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	2,189	1,805
Revolving Loans, Amortized Cost Basis	55,765	29,323
Revolving Loans Converted to Term Loans, Amortized Cost Basis	0	3,753
Total loans, net of unearned income	382,758	250,875
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	17,732
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	1,748	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	0
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	249	56
Revolving Loans, Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans, Amortized Cost Basis	0	0
Total loans, net of unearned income	1,997	17,788
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	390,238	161,021
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	141,269	78,605
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	56,703	63,255
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	52,111	30,903
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	32,681	21,233
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	116,043	80,261
Revolving Loans, Amortized Cost Basis	223,232	244,330
Revolving Loans Converted to Term Loans, Amortized Cost Basis	1,631	3,962
Total loans, net of unearned income	1,013,908	683,570
Allowance for Credit Loss	24,123	16,875	7,435	8,024
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	390,153	161,021
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	140,799	77,756
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	56,520	62,696
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	51,549	29,737
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	32,447	20,889
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	111,307	78,098
Revolving Loans, Amortized Cost Basis	222,747	243,325
Revolving Loans Converted to Term Loans, Amortized Cost Basis	1,347	3,655
Total loans, net of unearned income	1,006,869	677,177
Real estate: One-to-four family residential | 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		0
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year		332
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		195
Revolving Loans, Amortized Cost Basis		0
Revolving Loans Converted to Term Loans, Amortized Cost Basis		0
Total loans, net of unearned income		527
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	85	0
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	470	849
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	183	227
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	562	1,166
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	234	344
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	4,736	1,968
Revolving Loans, Amortized Cost Basis	485	1,005
Revolving Loans Converted to Term Loans, Amortized Cost Basis	284	307
Total loans, net of unearned income	7,039	5,866
Consumer Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	7,045	5,578
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,711	3,109
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	1,950	3,886
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	13,489	994
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	561	244
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	1,290	1,230
Revolving Loans, Amortized Cost Basis	15,876	19,964
Revolving Loans Converted to Term Loans, Amortized Cost Basis	106	514
Total loans, net of unearned income	43,028	35,519
Allowance for Credit Loss	1,944	1,393	$ 883	$ 786
Consumer Loan | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	7,045	5,548
Term Loans, Amortized Cost Basis, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,711	3,109
Term Loans, Amortized Cost Basis, Year Three, Originated, Two Years before Current Fiscal Year	1,950	3,886
Term Loans, Amortized Cost Basis, Year Four, Originated, Three Years before Current Fiscal Year	13,489	989
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	560	244
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	1,277	1,060
Revolving Loans, Amortized Cost Basis	15,853	19,911
Revolving Loans Converted to Term Loans, Amortized Cost Basis	97	474
Total loans, net of unearned income	42,982	35,221
Consumer Loan | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term Loans, Amortized Cost Basis, Year One, Originated, Current Fiscal Year	0	30
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	5
Term Loans, Amortized Cost Basis, Year Five, Originated, Four Years before Current Fiscal Year	1	0
Term Loans, Amortized Cost Basis, Originated, More than Five Years before Current Fiscal Year	13	170
Revolving Loans, Amortized Cost Basis	23	53
Revolving Loans Converted to Term Loans, Amortized Cost Basis	9	40
Total loans, net of unearned income	$ 46	$ 298