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Allowance for Credit Losses - Credit Quality Indicators by Commercial and Industrial Loans (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases, net of unearned income and deferred costs and fees	$ 5,352,365	$ 5,268,911
Commercial and industrial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	54,166	124,190
One year before current fiscal year	110,845	80,099
Two years before current fiscal year	76,199	39,021
Three years before current fiscal year	34,671	41,711
Four years before current fiscal year	40,068	34,242
Prior	171,727	157,921
Revolving Loans Amortized Cost Basis	210,376	222,050
Revolving Loans Converted to Term	2,954	6,466
Total loans and leases, net of unearned income and deferred costs and fees	701,006	705,700
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Commercial and industrial | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	54,166	124,190
One year before current fiscal year	110,845	79,861
Two years before current fiscal year	75,993	38,158
Three years before current fiscal year	33,954	41,391
Four years before current fiscal year	39,929	33,238
Prior	169,064	156,038
Revolving Loans Amortized Cost Basis	203,109	215,890
Revolving Loans Converted to Term	2,954	6,466
Total loans and leases, net of unearned income and deferred costs and fees	690,014	695,232
Commercial and industrial | Other | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	127
Two years before current fiscal year	112	421
Three years before current fiscal year	297	285
Four years before current fiscal year	113	271
Prior	1,488	1,380
Revolving Loans Amortized Cost Basis	771	501
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	2,781	2,985
Commercial and industrial | Other | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	111
Two years before current fiscal year	94	442
Three years before current fiscal year	420	35
Four years before current fiscal year	26	733
Prior	1,175	503
Revolving Loans Amortized Cost Basis	6,496	5,659
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	8,211	7,483
Commercial and industrial | PPP loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	416
Two years before current fiscal year	350	340
Three years before current fiscal year	263	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	613	756
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Commercial and industrial | PPP loans | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	416
Two years before current fiscal year	350	340
Three years before current fiscal year	263	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	613	756
Commercial and industrial | PPP loans | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	0	0
Commercial and industrial | PPP loans | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	0	0
Commercial and industrial | Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	5,774	16,694
One year before current fiscal year	13,555	4,178
Two years before current fiscal year	3,807	5,015
Three years before current fiscal year	3,966	4,186
Four years before current fiscal year	3,559	7,734
Prior	10,463	4,899
Revolving Loans Amortized Cost Basis	23,347	42,152
Revolving Loans Converted to Term	344	215
Total loans and leases, net of unearned income and deferred costs and fees	64,815	85,073
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Commercial and industrial | Agriculture | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	5,774	16,694
One year before current fiscal year	13,555	4,120
Two years before current fiscal year	3,754	4,944
Three years before current fiscal year	3,903	4,186
Four years before current fiscal year	3,559	7,734
Prior	10,452	4,883
Revolving Loans Amortized Cost Basis	23,314	42,097
Revolving Loans Converted to Term	344	215
Total loans and leases, net of unearned income and deferred costs and fees	64,655	84,873
Commercial and industrial | Agriculture | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	58
Two years before current fiscal year	53	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	30	50
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	83	108
Commercial and industrial | Agriculture | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	71
Three years before current fiscal year	63	0
Four years before current fiscal year	0	0
Prior	11	16
Revolving Loans Amortized Cost Basis	3	5
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	77	92
Commercial real estate | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	89,762	343,032
One year before current fiscal year	339,691	370,620
Two years before current fiscal year	365,493	313,295
Three years before current fiscal year	316,778	294,443
Four years before current fiscal year	289,424	207,263
Prior	1,048,437	873,145
Revolving Loans Amortized Cost Basis	31,545	11,038
Revolving Loans Converted to Term	5,937	24,503
Total loans and leases, net of unearned income and deferred costs and fees	2,487,067	2,437,339
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Commercial real estate | Other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	89,762	342,311
One year before current fiscal year	323,682	367,104
Two years before current fiscal year	363,357	311,607
Three years before current fiscal year	315,106	279,587
Four years before current fiscal year	275,367	203,016
Prior	978,544	812,563
Revolving Loans Amortized Cost Basis	30,045	10,906
Revolving Loans Converted to Term	5,937	24,503
Total loans and leases, net of unearned income and deferred costs and fees	2,381,800	2,351,597
Commercial real estate | Other | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	643
One year before current fiscal year	640	3,406
Two years before current fiscal year	2,028	1,688
Three years before current fiscal year	1,672	11,462
Four years before current fiscal year	11,142	2,555
Prior	35,097	25,361
Revolving Loans Amortized Cost Basis	1,384	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	51,963	45,115
Commercial real estate | Other | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	78
One year before current fiscal year	15,369	110
Two years before current fiscal year	108	0
Three years before current fiscal year	0	3,394
Four years before current fiscal year	2,915	1,692
Prior	34,796	35,221
Revolving Loans Amortized Cost Basis	116	132
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	53,304	40,627
Commercial real estate | Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	7,532	33,241
One year before current fiscal year	34,610	24,125
Two years before current fiscal year	23,534	22,831
Three years before current fiscal year	22,303	26,163
Four years before current fiscal year	25,089	37,873
Prior	99,286	66,364
Revolving Loans Amortized Cost Basis	1,165	3,131
Revolving Loans Converted to Term	2,396	1,235
Total loans and leases, net of unearned income and deferred costs and fees	215,915	214,963
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Commercial real estate | Agriculture | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	7,532	33,241
One year before current fiscal year	34,610	24,125
Two years before current fiscal year	23,534	22,831
Three years before current fiscal year	22,303	25,576
Four years before current fiscal year	24,520	37,835
Prior	98,149	65,112
Revolving Loans Amortized Cost Basis	1,165	3,131
Revolving Loans Converted to Term	2,396	1,235
Total loans and leases, net of unearned income and deferred costs and fees	214,209	213,086
Commercial real estate | Agriculture | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	401
Four years before current fiscal year	390	0
Prior	1,088	1,142
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	1,478	1,543
Commercial real estate | Agriculture | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	186
Four years before current fiscal year	179	38
Prior	49	110
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	228	334
Commercial real estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	23,105
One year before current fiscal year	40,996	75,245
Two years before current fiscal year	78,869	27,584
Three years before current fiscal year	16,481	14,842
Four years before current fiscal year	9,976	9,083
Prior	11,449	7,268
Revolving Loans Amortized Cost Basis	84,040	42,701
Revolving Loans Converted to Term	8,036	1,288
Total loans and leases, net of unearned income and deferred costs and fees	249,847	201,116
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Commercial real estate | Construction | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	23,105
One year before current fiscal year	40,996	75,245
Two years before current fiscal year	78,869	27,584
Three years before current fiscal year	16,481	14,842
Four years before current fiscal year	9,976	9,083
Prior	11,449	7,268
Revolving Loans Amortized Cost Basis	84,040	42,701
Revolving Loans Converted to Term	8,036	1,288
Total loans and leases, net of unearned income and deferred costs and fees	249,847	201,116
Commercial real estate | Construction | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	0	0
Commercial real estate | Construction | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	0	0
Residential Real Estate | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	1,244	3,030
One year before current fiscal year	2,363	1,062
Two years before current fiscal year	969	637
Three years before current fiscal year	583	1,006
Four years before current fiscal year	910	792
Prior	10,148	3,208
Revolving Loans Amortized Cost Basis	166,603	177,803
Revolving Loans Converted to Term	2,709	1,085
Total loans and leases, net of unearned income and deferred costs and fees	185,529	188,623
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	2
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	2
Residential Real Estate | Home equity | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	1,244	3,030
One year before current fiscal year	2,363	1,062
Two years before current fiscal year	969	637
Three years before current fiscal year	583	992
Four years before current fiscal year	910	792
Prior	9,697	3,183
Revolving Loans Amortized Cost Basis	164,163	175,451
Revolving Loans Converted to Term	2,709	1,085
Total loans and leases, net of unearned income and deferred costs and fees	182,638	186,232
Residential Real Estate | Home equity | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	14
Four years before current fiscal year	0	0
Prior	451	25
Revolving Loans Amortized Cost Basis	2,440	2,352
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	2,891	2,391
Residential Real Estate | Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	50,668	187,347
One year before current fiscal year	191,555	272,570
Two years before current fiscal year	265,433	240,212
Three years before current fiscal year	232,540	118,073
Four years before current fiscal year	114,521	68,157
Prior	493,731	459,959
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	1,348,448	1,346,318
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Residential Real Estate | Mortgages | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	50,668	187,129
One year before current fiscal year	191,160	272,235
Two years before current fiscal year	265,103	239,584
Three years before current fiscal year	231,672	117,391
Four years before current fiscal year	113,613	66,605
Prior	482,913	452,221
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	1,335,129	1,335,165
Residential Real Estate | Mortgages | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	218
One year before current fiscal year	395	335
Two years before current fiscal year	330	628
Three years before current fiscal year	868	682
Four years before current fiscal year	908	1,552
Prior	10,818	7,738
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	13,319	11,153
Consumer and Other | Direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	31,859	31,243
One year before current fiscal year	15,191	13,999
Two years before current fiscal year	12,738	7,375
Three years before current fiscal year	6,305	6,231
Four years before current fiscal year	5,452	4,462
Prior	11,395	8,029
Revolving Loans Amortized Cost Basis	2,854	4,073
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	85,794	75,412
Current-period gross writeoffs
2023	155
2022	8
2021	0
2020	14
2019	36
Prior	13
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	226
Consumer and Other | Direct | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	31,859	31,243
One year before current fiscal year	15,186	13,999
Two years before current fiscal year	12,737	7,372
Three years before current fiscal year	6,302	6,138
Four years before current fiscal year	5,360	4,386
Prior	11,263	8,029
Revolving Loans Amortized Cost Basis	2,851	4,070
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	85,558	75,237
Consumer and Other | Direct | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	5	0
Two years before current fiscal year	1	3
Three years before current fiscal year	3	93
Four years before current fiscal year	92	76
Prior	132	0
Revolving Loans Amortized Cost Basis	3	3
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	236	175
Consumer and Other | Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	156
Two years before current fiscal year	123	146
Three years before current fiscal year	113	1,168
Four years before current fiscal year	747	645
Prior	436	109
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	1,419	2,224
Current-period gross writeoffs
2023	0
2022	0
2021	0
2020	0
2019	39
Prior	10
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	49
Consumer and Other | Indirect | Performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	156
Two years before current fiscal year	123	146
Three years before current fiscal year	113	1,092
Four years before current fiscal year	676	635
Prior	420	101
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	1,332	2,130
Consumer and Other | Indirect | Nonperforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current fiscal year	0	0
One year before current fiscal year	0	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	76
Four years before current fiscal year	71	10
Prior	16	8
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total loans and leases, net of unearned income and deferred costs and fees	$ 87	$ 94

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Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

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Amount, excluding accrued interest, of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
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