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Loans and the Allowance for Credit Losses - Summary of Amortized Cost Basis Loan Balances by Year of Origination and Credit Quality Indicator (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Financing Receivable, Recorded Investment [Line Items] |  |  |
Portfolio loans, net of unearned income | $ 10,703,312 |  | $ 10,789,233
Current-period gross write-offs | (2,460) | $ (6,126) |
Current-period recoveries | 1,812 | 1,410 |
Home Equity [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 4,724 |  | 18,315
Amortized Cost Basis by Origination Year 2020 | 15,055 |  | 3,611
Amortized Cost Basis by Origination Year 2019 | 3,290 |  | 3,376
Amortized Cost Basis by Origination Year 2018 | 2,978 |  | 1,131
Amortized Cost Basis by Origination Year 2017 | 1,007 |  | 1,198
Amortized Cost Basis by Origination Year, Prior to 2017 | 19,081 |  | 19,159
Revolving Loans | 575,867 |  | 586,557
Revolving Loans Converted to Term | 12,016 |  | 13,040
Portfolio loans, net of unearned income | 634,018 |  | 646,387
Current-period gross write-offs | (174) | (443) |
Current-period recoveries | 79 | 172 |
Home Equity [Member] | Current [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 4,724 |  | 18,191
Amortized Cost Basis by Origination Year 2020 | 15,055 |  | 3,611
Amortized Cost Basis by Origination Year 2019 | 3,290 |  | 3,334
Amortized Cost Basis by Origination Year 2018 | 2,959 |  | 975
Amortized Cost Basis by Origination Year 2017 | 857 |  | 1,110
Amortized Cost Basis by Origination Year, Prior to 2017 | 16,995 |  | 16,477
Revolving Loans | 573,653 |  | 583,486
Revolving Loans Converted to Term | 11,240 |  | 12,135
Portfolio loans, net of unearned income | 628,773 |  | 639,319
Home Equity [Member] | 30-59 Days Past Due [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 |  |  | 124
Amortized Cost Basis by Origination Year 2019 |  |  | 34
Amortized Cost Basis by Origination Year, Prior to 2017 | 400 |  | 882
Revolving Loans | 783 |  | 1,247
Revolving Loans Converted to Term | 30 |  | 127
Portfolio loans, net of unearned income | 1,213 |  | 2,414
Home Equity [Member] | 60-89 Days Past Due [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year, Prior to 2017 | 121 |  | 14
Revolving Loans | 76 |  | 749
Revolving Loans Converted to Term |  |  | 12
Portfolio loans, net of unearned income | 197 |  | 775
Home Equity [Member] | 90 Days or More Past Due [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2019 |  |  | 8
Amortized Cost Basis by Origination Year 2018 | 19 |  | 156
Amortized Cost Basis by Origination Year 2017 | 150 |  | 88
Amortized Cost Basis by Origination Year, Prior to 2017 | 1,565 |  | 1,786
Revolving Loans | 1,355 |  | 1,075
Revolving Loans Converted to Term | 746 |  | 766
Portfolio loans, net of unearned income | 3,835 |  | 3,879
Commercial Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Portfolio loans, net of unearned income | 5,712,742 |  | 5,705,392
Residential Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 66,997 |  | 385,541
Amortized Cost Basis by Origination Year 2020 | 392,577 |  | 243,253
Amortized Cost Basis by Origination Year 2019 | 209,613 |  | 150,912
Amortized Cost Basis by Origination Year 2018 | 131,570 |  | 109,384
Amortized Cost Basis by Origination Year 2017 | 95,111 |  | 171,971
Amortized Cost Basis by Origination Year, Prior to 2017 | 748,554 |  | 659,900
Portfolio loans, net of unearned income | 1,644,422 |  | 1,720,961
Current-period gross write-offs | (371) | (386) |
Current-period recoveries | 135 | 272 |
Residential Real Estate [Member] | Current [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 66,997 |  | 385,541
Amortized Cost Basis by Origination Year 2020 | 392,577 |  | 242,770
Amortized Cost Basis by Origination Year 2019 | 209,234 |  | 149,603
Amortized Cost Basis by Origination Year 2018 | 130,435 |  | 108,090
Amortized Cost Basis by Origination Year 2017 | 94,237 |  | 170,967
Amortized Cost Basis by Origination Year, Prior to 2017 | 731,848 |  | 641,665
Portfolio loans, net of unearned income | 1,625,328 |  | 1,698,636
Residential Real Estate [Member] | 30-59 Days Past Due [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2019 |  |  | 320
Amortized Cost Basis by Origination Year 2018 | 79 |  | 533
Amortized Cost Basis by Origination Year, Prior to 2017 | 2,634 |  | 1,761
Portfolio loans, net of unearned income | 2,713 |  | 2,614
Residential Real Estate [Member] | 60-89 Days Past Due [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2019 |  |  | 823
Amortized Cost Basis by Origination Year 2018 | 272 |  |
Amortized Cost Basis by Origination Year 2017 | 113 |  | 185
Amortized Cost Basis by Origination Year, Prior to 2017 | 1,204 |  | 4,646
Portfolio loans, net of unearned income | 1,589 |  | 5,654
Residential Real Estate [Member] | 90 Days or More Past Due [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2020 |  |  | 483
Amortized Cost Basis by Origination Year 2019 | 379 |  | 166
Amortized Cost Basis by Origination Year 2018 | 784 |  | 761
Amortized Cost Basis by Origination Year 2017 | 761 |  | 819
Amortized Cost Basis by Origination Year, Prior to 2017 | 12,868 |  | 11,828
Portfolio loans, net of unearned income | 14,792 |  | 14,057
Consumer [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 18,158 |  | 73,714
Amortized Cost Basis by Origination Year 2020 | 66,299 |  | 90,264
Amortized Cost Basis by Origination Year 2019 | 79,508 |  | 39,951
Amortized Cost Basis by Origination Year 2018 | 33,739 |  | 22,560
Amortized Cost Basis by Origination Year 2017 | 18,980 |  | 13,513
Amortized Cost Basis by Origination Year, Prior to 2017 | 51,938 |  | 46,609
Revolving Loans | 20,607 |  | 22,279
Revolving Loans Converted to Term | 166 |  | 165
Portfolio loans, net of unearned income | 289,395 |  | 309,055
Current-period gross write-offs | (927) | (856) |
Current-period recoveries | 462 | 415 |
Consumer [Member] | Current [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 18,121 |  | 72,847
Amortized Cost Basis by Origination Year 2020 | 65,802 |  | 89,637
Amortized Cost Basis by Origination Year 2019 | 79,045 |  | 39,584
Amortized Cost Basis by Origination Year 2018 | 33,586 |  | 22,118
Amortized Cost Basis by Origination Year 2017 | 18,773 |  | 13,144
Amortized Cost Basis by Origination Year, Prior to 2017 | 51,313 |  | 45,735
Revolving Loans | 20,589 |  | 22,253
Revolving Loans Converted to Term | 166 |  | 165
Portfolio loans, net of unearned income | 287,395 |  | 305,483
Consumer [Member] | 30-59 Days Past Due [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 37 |  | 481
Amortized Cost Basis by Origination Year 2020 | 444 |  | 408
Amortized Cost Basis by Origination Year 2019 | 413 |  | 210
Amortized Cost Basis by Origination Year 2018 | 68 |  | 311
Amortized Cost Basis by Origination Year 2017 | 114 |  | 194
Amortized Cost Basis by Origination Year, Prior to 2017 | 352 |  | 379
Revolving Loans |  |  | 15
Portfolio loans, net of unearned income | 1,428 |  | 1,998
Consumer [Member] | 60-89 Days Past Due [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 |  |  | 273
Amortized Cost Basis by Origination Year 2020 | 45 |  | 147
Amortized Cost Basis by Origination Year 2019 | 50 |  | 84
Amortized Cost Basis by Origination Year 2018 | 31 |  | 100
Amortized Cost Basis by Origination Year 2017 | 64 |  | 163
Amortized Cost Basis by Origination Year, Prior to 2017 | 148 |  | 253
Revolving Loans | 2 |  | 11
Portfolio loans, net of unearned income | 340 |  | 1,031
Consumer [Member] | 90 Days or More Past Due [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 |  |  | 113
Amortized Cost Basis by Origination Year 2020 | 8 |  | 72
Amortized Cost Basis by Origination Year 2019 |  |  | 73
Amortized Cost Basis by Origination Year 2018 | 54 |  | 31
Amortized Cost Basis by Origination Year 2017 | 29 |  | 12
Amortized Cost Basis by Origination Year, Prior to 2017 | 125 |  | 242
Revolving Loans | 16 |  |
Portfolio loans, net of unearned income | 232 |  | 543
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 30,840 |  | 134,179
Amortized Cost Basis by Origination Year 2020 | 165,814 |  | 314,614
Amortized Cost Basis by Origination Year 2019 | 296,600 |  | 111,167
Amortized Cost Basis by Origination Year 2018 | 49,862 |  | 27,774
Amortized Cost Basis by Origination Year 2017 | 27,332 |  | 16,774
Amortized Cost Basis by Origination Year, Prior to 2017 | 48,469 |  | 36,156
Revolving Loans | 23,100 |  | 27,613
Portfolio loans, net of unearned income | 642,017 |  | 668,277
Current-period gross write-offs | (18) | (1) |
Current-period recoveries | 55 | 8 |
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 30,840 |  | 133,720
Amortized Cost Basis by Origination Year 2020 | 164,939 |  | 314,614
Amortized Cost Basis by Origination Year 2019 | 296,600 |  | 109,232
Amortized Cost Basis by Origination Year 2018 | 49,749 |  | 27,483
Amortized Cost Basis by Origination Year 2017 | 27,064 |  | 16,404
Amortized Cost Basis by Origination Year, Prior to 2017 | 43,143 |  | 29,685
Revolving Loans | 22,500 |  | 26,297
Portfolio loans, net of unearned income | 634,835 |  | 657,435
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | Criticized [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 |  |  | 459
Amortized Cost Basis by Origination Year 2020 | 875 |  |
Amortized Cost Basis by Origination Year 2019 |  |  | 1,532
Amortized Cost Basis by Origination Year 2018 | 39 |  | 233
Amortized Cost Basis by Origination Year 2017 | 228 |  | 79
Amortized Cost Basis by Origination Year, Prior to 2017 | 3,618 |  | 3,778
Revolving Loans | 600 |  | 1,316
Portfolio loans, net of unearned income | 5,360 |  | 7,397
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | Classified - substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2019 |  |  | 403
Amortized Cost Basis by Origination Year 2018 | 74 |  | 58
Amortized Cost Basis by Origination Year 2017 | 40 |  | 291
Amortized Cost Basis by Origination Year, Prior to 2017 | 1,708 |  | 2,693
Portfolio loans, net of unearned income | 1,822 |  | 3,445
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 156,789 |  | 812,311
Amortized Cost Basis by Origination Year 2020 | 789,410 |  | 754,181
Amortized Cost Basis by Origination Year 2019 | 772,808 |  | 668,368
Amortized Cost Basis by Origination Year 2018 | 659,248 |  | 545,520
Amortized Cost Basis by Origination Year 2017 | 533,548 |  | 633,477
Amortized Cost Basis by Origination Year, Prior to 2017 | 2,071,424 |  | 1,532,366
Revolving Loans | 87,498 |  | 90,892
Portfolio loans, net of unearned income | 5,070,725 |  | 5,037,115
Current-period gross write-offs | (19) | (1,398) |
Current-period recoveries | 528 | 293 |
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 156,789 |  | 809,516
Amortized Cost Basis by Origination Year 2020 | 787,296 |  | 670,554
Amortized Cost Basis by Origination Year 2019 | 690,398 |  | 646,629
Amortized Cost Basis by Origination Year 2018 | 639,915 |  | 474,622
Amortized Cost Basis by Origination Year 2017 | 472,801 |  | 572,733
Amortized Cost Basis by Origination Year, Prior to 2017 | 1,864,909 |  | 1,346,552
Revolving Loans | 67,149 |  | 89,120
Portfolio loans, net of unearned income | 4,679,257 |  | 4,609,726
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Criticized [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 |  |  | 2,693
Amortized Cost Basis by Origination Year 2020 | 1,892 |  | 67,261
Amortized Cost Basis by Origination Year 2019 | 53,807 |  | 16,793
Amortized Cost Basis by Origination Year 2018 | 17,473 |  | 59,251
Amortized Cost Basis by Origination Year 2017 | 53,576 |  | 42,284
Amortized Cost Basis by Origination Year, Prior to 2017 | 150,704 |  | 130,247
Revolving Loans | 20,349 |  | 1,772
Portfolio loans, net of unearned income | 297,801 |  | 320,301
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Classified - substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 |  |  | 102
Amortized Cost Basis by Origination Year 2020 | 222 |  | 16,366
Amortized Cost Basis by Origination Year 2019 | 28,603 |  | 4,946
Amortized Cost Basis by Origination Year 2018 | 1,860 |  | 11,647
Amortized Cost Basis by Origination Year 2017 | 7,171 |  | 18,460
Amortized Cost Basis by Origination Year, Prior to 2017 | 55,811 |  | 55,567
Portfolio loans, net of unearned income | 93,667 |  | 107,088
Commercial and Industrial [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 402,334 |  | 977,538
Amortized Cost Basis by Origination Year 2020 | 688,922 |  | 246,805
Amortized Cost Basis by Origination Year 2019 | 237,586 |  | 199,865
Amortized Cost Basis by Origination Year 2018 | 191,388 |  | 167,490
Amortized Cost Basis by Origination Year 2017 | 142,074 |  | 87,306
Amortized Cost Basis by Origination Year, Prior to 2017 | 336,808 |  | 282,603
Revolving Loans | 423,493 |  | 445,695
Revolving Loans Converted to Term | 130 |  | 136
Portfolio loans, net of unearned income | 2,422,735 |  | 2,407,438
Current-period gross write-offs | (750) | (2,714) |
Current-period recoveries | 440 | $ 107 |
Commercial and Industrial [Member] | Pass [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 401,323 |  | 977,085
Amortized Cost Basis by Origination Year 2020 | 685,632 |  | 240,262
Amortized Cost Basis by Origination Year 2019 | 232,322 |  | 193,712
Amortized Cost Basis by Origination Year 2018 | 185,484 |  | 160,924
Amortized Cost Basis by Origination Year 2017 | 135,856 |  | 85,379
Amortized Cost Basis by Origination Year, Prior to 2017 | 320,788 |  | 265,890
Revolving Loans | 404,023 |  | 427,336
Revolving Loans Converted to Term | 130 |  | 136
Portfolio loans, net of unearned income | 2,365,558 |  | 2,350,724
Commercial and Industrial [Member] | Criticized [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 26 |  | 453
Amortized Cost Basis by Origination Year 2020 | 3,290 |  | 2,726
Amortized Cost Basis by Origination Year 2019 | 2,746 |  | 4,206
Amortized Cost Basis by Origination Year 2018 | 4,236 |  | 2,795
Amortized Cost Basis by Origination Year 2017 | 2,651 |  | 324
Amortized Cost Basis by Origination Year, Prior to 2017 | 10,841 |  | 11,640
Revolving Loans | 13,992 |  | 12,453
Portfolio loans, net of unearned income | 37,782 |  | 34,597
Commercial and Industrial [Member] | Classified - substandard [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Amortized Cost Basis by Origination Year 2021 | 985 |  |
Amortized Cost Basis by Origination Year 2020 |  |  | 3,817
Amortized Cost Basis by Origination Year 2019 | 2,518 |  | 1,947
Amortized Cost Basis by Origination Year 2018 | 1,668 |  | 3,771
Amortized Cost Basis by Origination Year 2017 | 3,567 |  | 1,603
Amortized Cost Basis by Origination Year, Prior to 2017 | 5,179 |  | 5,073
Revolving Loans | 5,478 |  | 5,906
Portfolio loans, net of unearned income | $ 19,395 |  | $ 22,117

X
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- Definition Amount of financing receivable originated three years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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