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Allowance for Credit Losses - Credit Quality Indicators by Class of Residential Real Estate and Consumer 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
Residential real estate | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 689 | 1,440
Fiscal year before current fiscal year | 1,287 | 2,782
Two years before current fiscal year | 3,238 | 1,052
Three years before current fiscal year | 1,858 | 2,120
Four years before current fiscal year | 1,822 | 916
Prior | 1,911 | 1,612
Revolving Loans Amortized Cost Basis | 172,554 | 190,861
Revolving Loans Converted to Term | 4,222 | 44
Total loans and leases, net of unearned income and deferred costs and fees | 187,581 | 200,827
Residential real estate | Mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 148,238 | 305,476
Fiscal year before current fiscal year | 295,017 | 193,801
Two years before current fiscal year | 175,802 | 123,660
Three years before current fiscal year | 109,585 | 156,405
Four years before current fiscal year | 139,581 | 179,553
Prior | 367,159 | 262,861
Revolving Loans Amortized Cost Basis | 10,487 | 11,787
Revolving Loans Converted to Term | 581 | 1,617
Total loans and leases, net of unearned income and deferred costs and fees | 1,246,450 | 1,235,160
Residential real estate | Performing | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 689 | 1,440
Fiscal year before current fiscal year | 1,287 | 2,764
Two years before current fiscal year | 3,221 | 1,052
Three years before current fiscal year | 1,858 | 2,120
Four years before current fiscal year | 1,822 | 722
Prior | 1,278 | 1,106
Revolving Loans Amortized Cost Basis | 170,670 | 188,614
Revolving Loans Converted to Term | 4,222 | 44
Total loans and leases, net of unearned income and deferred costs and fees | 185,047 | 197,862
Residential real estate | Performing | Mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 148,238 | 305,476
Fiscal year before current fiscal year | 295,017 | 193,543
Two years before current fiscal year | 175,802 | 123,205
Three years before current fiscal year | 109,328 | 155,699
Four years before current fiscal year | 138,882 | 178,149
Prior | 359,124 | 255,556
Revolving Loans Amortized Cost Basis | 10,456 | 11,735
Revolving Loans Converted to Term | 581 | 1,617
Total loans and leases, net of unearned income and deferred costs and fees | 1,237,428 | 1,224,980
Residential real estate | Nonperforming | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
Fiscal year before current fiscal year | 0 | 18
Two years before current fiscal year | 17 | 0
Three years before current fiscal year | 0 | 0
Four years before current fiscal year | 0 | 194
Prior | 633 | 506
Revolving Loans Amortized Cost Basis | 1,884 | 2,247
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 2,534 | 2,965
Residential real estate | Nonperforming | Mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
Fiscal year before current fiscal year | 0 | 258
Two years before current fiscal year | 0 | 455
Three years before current fiscal year | 257 | 706
Four years before current fiscal year | 699 | 1,404
Prior | 8,035 | 7,305
Revolving Loans Amortized Cost Basis | 31 | 52
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 9,022 | 10,180
Consumer and other | Direct |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 12,624 | 14,845
Fiscal year before current fiscal year | 12,513 | 11,201
Two years before current fiscal year | 10,670 | 8,178
Three years before current fiscal year | 6,693 | 6,644
Four years before current fiscal year | 5,536 | 2,854
Prior | 11,115 | 10,842
Revolving Loans Amortized Cost Basis | 5,220 | 6,835
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 64,371 | 61,399
Consumer and other | Indirect |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 1,075 | 1,424
Fiscal year before current fiscal year | 1,134 | 1,945
Two years before current fiscal year | 1,005 | 3,371
Three years before current fiscal year | 2,487 | 1,135
Four years before current fiscal year | 624 | 418
Prior | 172 | 108
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 | 6,497 | 8,401
Consumer and other | Performing | Direct |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 12,624 | 14,840
Fiscal year before current fiscal year | 12,508 | 11,127
Two years before current fiscal year | 10,628 | 8,011
Three years before current fiscal year | 6,625 | 6,632
Four years before current fiscal year | 5,524 | 2,854
Prior | 11,115 | 10,840
Revolving Loans Amortized Cost Basis | 5,219 | 6,835
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 64,243 | 61,139
Consumer and other | Performing | Indirect |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 1,075 | 1,424
Fiscal year before current fiscal year | 1,134 | 1,878
Two years before current fiscal year | 874 | 3,327
Three years before current fiscal year | 2,424 | 1,128
Four years before current fiscal year | 622 | 382
Prior | 142 | 93
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 | 6,271 | 8,232
Consumer and other | Nonperforming | Direct |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 5
Fiscal year before current fiscal year | 5 | 74
Two years before current fiscal year | 42 | 167
Three years before current fiscal year | 68 | 12
Four years before current fiscal year | 12 | 0
Prior | 0 | 2
Revolving Loans Amortized Cost Basis | 1 | 0
Revolving Loans Converted to Term | 0 | 0
Total loans and leases, net of unearned income and deferred costs and fees | 128 | 260
Consumer and other | Nonperforming | Indirect |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
Fiscal year before current fiscal year | 0 | 67
Two years before current fiscal year | 131 | 44
Three years before current fiscal year | 63 | 7
Four years before current fiscal year | 2 | 36
Prior | 30 | 15
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 | $ 226 | $ 169

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