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Allowance for Credit Losses - Credit Quality Indicators by Commercial and Industrial Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans and leases, net of unearned income and deferred costs and fees | $ 5,175,129 | $ 5,260,327
Commercial and industrial | Commercial and industrial other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 61,792 | 93,073
Fiscal year before current fiscal year | 70,445 | 73,311
Two years before current fiscal year | 62,795 | 57,468
Three years before current fiscal year | 49,776 | 62,111
Four years before current fiscal year | 47,722 | 35,739
Prior | 310,223 | 302,038
Revolving Loans Amortized Cost Basis | 149,718 | 152,946
Revolving Loans Converted to Term | 3,414 | 16,301
Total loans and leases, net of unearned income and deferred costs and fees | 755,885 | 792,987
Commercial and industrial | Commercial and industrial other | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 61,749 | 91,597
Fiscal year before current fiscal year | 69,200 | 72,639
Two years before current fiscal year | 62,167 | 56,191
Three years before current fiscal year | 48,666 | 60,714
Four years before current fiscal year | 46,939 | 33,402
Prior | 308,161 | 301,027
Revolving Loans Amortized Cost Basis | 147,361 | 149,969
Revolving Loans Converted to Term | 3,414 | 16,301
Total loans and leases, net of unearned income and deferred costs and fees | 747,657 | 781,840
Commercial and industrial | Commercial and industrial other | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 28 | 1,064
Fiscal year before current fiscal year | 860 | 367
Two years before current fiscal year | 328 | 344
Three years before current fiscal year | 309 | 912
Four years before current fiscal year | 552 | 2,045
Prior | 1,367 | 228
Revolving Loans Amortized Cost Basis | 799 | 1,331
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 4,243 | 6,291
Commercial and industrial | Commercial and industrial other | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 15 | 412
Fiscal year before current fiscal year | 385 | 305
Two years before current fiscal year | 300 | 933
Three years before current fiscal year | 801 | 485
Four years before current fiscal year | 231 | 292
Prior | 695 | 783
Revolving Loans Amortized Cost Basis | 1,558 | 1,646
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 3,985 | 4,856
Commercial and industrial | PPP loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 205,576 | 291,252
Fiscal year before current fiscal year | 53,388 | 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 | 258,964 | 291,252
Commercial and industrial | PPP loans | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 205,576 | 291,252
Fiscal year before current fiscal year | 53,388 | 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 | 258,964 | 291,252
Commercial and industrial | PPP loans | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
Fiscal 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
Fiscal 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 | 2,993 | 11,635
Fiscal year before current fiscal year | 9,097 | 8,088
Two years before current fiscal year | 6,605 | 11,190
Three years before current fiscal year | 9,827 | 7,462
Four years before current fiscal year | 6,863 | 3,539
Prior | 6,684 | 4,907
Revolving Loans Amortized Cost Basis | 37,014 | 46,328
Revolving Loans Converted to Term | 268 | 1,340
Total loans and leases, net of unearned income and deferred costs and fees | 79,351 | 94,489
Commercial and industrial | Agriculture | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 2,993 | 11,536
Fiscal year before current fiscal year | 9,004 | 8,005
Two years before current fiscal year | 6,581 | 11,162
Three years before current fiscal year | 9,802 | 6,531
Four years before current fiscal year | 6,724 | 3,539
Prior | 4,347 | 2,599
Revolving Loans Amortized Cost Basis | 35,006 | 41,936
Revolving Loans Converted to Term | 268 | 1,340
Total loans and leases, net of unearned income and deferred costs and fees | 74,725 | 86,648
Commercial and industrial | Agriculture | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
Fiscal year before current fiscal year | 0 | 0
Two years before current fiscal year | 0 | 28
Three years before current fiscal year | 25 | 729
Four years before current fiscal year | 21 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 225 | 2,080
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 271 | 2,837
Commercial and industrial | Agriculture | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 99
Fiscal year before current fiscal year | 93 | 83
Two years before current fiscal year | 24 | 0
Three years before current fiscal year | 0 | 202
Four years before current fiscal year | 118 | 0
Prior | 2,337 | 2,308
Revolving Loans Amortized Cost Basis | 1,783 | 2,312
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 4,355 | 5,004
Commercial real estate | Commercial and industrial other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 145,134 | 278,782
Fiscal year before current fiscal year | 271,717 | 264,280
Two years before current fiscal year | 275,121 | 256,658
Three years before current fiscal year | 229,066 | 248,313
Four years before current fiscal year | 238,927 | 330,041
Prior | 957,255 | 727,711
Revolving Loans Amortized Cost Basis | 74,018 | 33,622
Revolving Loans Converted to Term | 22,560 | 64,903
Total loans and leases, net of unearned income and deferred costs and fees | 2,213,798 | 2,204,310
Commercial real estate | Commercial and industrial other | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 145,134 | 278,747
Fiscal year before current fiscal year | 269,940 | 246,331
Two years before current fiscal year | 258,852 | 232,651
Three years before current fiscal year | 206,663 | 237,487
Four years before current fiscal year | 228,178 | 290,106
Prior | 858,179 | 664,027
Revolving Loans Amortized Cost Basis | 73,474 | 33,117
Revolving Loans Converted to Term | 22,560 | 64,903
Total loans and leases, net of unearned income and deferred costs and fees | 2,062,980 | 2,047,369
Commercial real estate | Commercial and industrial other | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 35
Fiscal year before current fiscal year | 1,777 | 13,016
Two years before current fiscal year | 11,336 | 5,612
Three years before current fiscal year | 3,868 | 4,654
Four years before current fiscal year | 4,578 | 34,310
Prior | 78,555 | 46,074
Revolving Loans Amortized Cost Basis | 362 | 203
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 100,476 | 103,904
Commercial real estate | Commercial and industrial other | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
Fiscal year before current fiscal year | 0 | 4,933
Two years before current fiscal year | 4,933 | 18,395
Three years before current fiscal year | 18,535 | 6,172
Four years before current fiscal year | 6,171 | 5,625
Prior | 20,521 | 17,610
Revolving Loans Amortized Cost Basis | 182 | 302
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 50,342 | 53,037
Commercial real estate | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 11,618 | 24,400
Fiscal year before current fiscal year | 22,724 | 35,081
Two years before current fiscal year | 32,737 | 45,094
Three years before current fiscal year | 43,203 | 25,499
Four years before current fiscal year | 24,080 | 18,847
Prior | 60,261 | 46,092
Revolving Loans Amortized Cost Basis | 4,654 | 1,251
Revolving Loans Converted to Term | 2,586 | 5,602
Total loans and leases, net of unearned income and deferred costs and fees | 201,863 | 201,866
Commercial real estate | Agriculture | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 11,618 | 22,440
Fiscal year before current fiscal year | 20,794 | 35,081
Two years before current fiscal year | 32,737 | 44,519
Three years before current fiscal year | 43,163 | 22,356
Four years before current fiscal year | 24,080 | 17,081
Prior | 57,892 | 44,559
Revolving Loans Amortized Cost Basis | 3,970 | 919
Revolving Loans Converted to Term | 2,586 | 5,602
Total loans and leases, net of unearned income and deferred costs and fees | 196,840 | 192,557
Commercial real estate | Agriculture | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 1,960
Fiscal year before current fiscal year | 1,930 | 0
Two years before current fiscal year | 0 | 575
Three years before current fiscal year | 0 | 1,366
Four years before current fiscal year | 0 | 1,053
Prior | 4 | 6
Revolving Loans Amortized Cost Basis | 49 | 49
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 1,983 | 5,009
Commercial real estate | Agriculture | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
Fiscal year before current fiscal year | 0 | 0
Two years before current fiscal year | 0 | 0
Three years before current fiscal year | 40 | 1,777
Four years before current fiscal year | 0 | 713
Prior | 2,365 | 1,527
Revolving Loans Amortized Cost Basis | 635 | 283
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 3,040 | 4,300
Commercial real estate | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 5,069 | 14,465
Fiscal year before current fiscal year | 13,480 | 20,705
Two years before current fiscal year | 18,804 | 7,999
Three years before current fiscal year | 7,745 | 2,478
Four years before current fiscal year | 1,739 | 1,879
Prior | 9,961 | 7,473
Revolving Loans Amortized Cost Basis | 92,836 | 86,966
Revolving Loans Converted to Term | 9,020 | 21,051
Total loans and leases, net of unearned income and deferred costs and fees | 158,654 | 163,016
Commercial real estate | Construction | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 5,069 | 14,465
Fiscal year before current fiscal year | 13,480 | 20,705
Two years before current fiscal year | 18,804 | 7,999
Three years before current fiscal year | 7,745 | 2,478
Four years before current fiscal year | 1,739 | 1,879
Prior | 9,308 | 6,682
Revolving Loans Amortized Cost Basis | 92,062 | 85,513
Revolving Loans Converted to Term | 9,020 | 21,051
Total loans and leases, net of unearned income and deferred costs and fees | 157,227 | 160,772
Commercial real estate | Construction | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
Fiscal 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 | 340 | 467
Revolving Loans Amortized Cost Basis | 774 | 1,453
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 1,114 | 1,920
Commercial real estate | Construction | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
Fiscal 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 | 313 | 324
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 | $ 313 | $ 324

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