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v3.21.1

Allowance for Credit Losses - Age Analysis of Past Due Loans Segregated by Class of Loans (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 USD ($) loan | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) loan | Dec. 31, 2019 USD ($)
Financing Receivable, Past Due [Line Items] |  |  |  |
Current | $ 7,047,844 |  | $ 7,069,730 |
Past due | 135,324 |  | 156,130 |
Non - performing | 132,413 |  | 146,774 | $ 54,057
Total | 7,183,168 |  | 7,225,860 |
Financing receivable, nonaccrual, including held-for-sale | 135,200 |  |  |
Restructured loans | 6,865 | $ 1,897 |  |
30 to 59 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 2,737 |  | 2,888 |
60 to 89 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 174 |  | 5,965 |
90 Days Past Due |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 0 |  | 503 |
Commercial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | $ 5,676,683 |  | $ 5,673,707 |
Commercial | CARES Act, Paycheck Protection Program Loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Number of modified loans | loan | 40 |  | 52 |
Restructured loans | $ 61,800 |  |  |
Commercial | Commercial real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Current | 2,685,253 |  | $ 2,690,877 |
Past due | 95,074 |  | 101,070 |
Non - performing | 95,074 |  | 101,070 | 25,356
Total | 2,780,327 |  | 2,791,947 |
Restructured loans | 0 | 0 |  |
Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Current | 1,687,172 |  | 1,542,567 |
Past due | 12,416 |  | 16,985 |
Non - performing | 12,416 |  | 16,985 | 10,911
Total | 1,699,588 |  | 1,559,552 |
Financing receivable, nonaccrual, held-for-sale | 2,800 |  |  |
Restructured loans | 6,296 | 0 |  |
Commercial | Commercial construction |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Current | 449,074 |  | 462,094 |
Past due | 384 |  | 3,983 |
Non - performing | 384 |  | 384 | 737
Total | 449,459 |  | 466,077 |
Restructured loans | 0 | 1,806 |  |
Commercial | Business banking |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Current | 1,053,430 |  | 1,140,581 |
Past due | 15,647 |  | 19,486 |
Non - performing | 14,426 |  | 17,122 | 9,863
Total | 1,069,078 |  | 1,160,067 |
Restructured loans | 0 | 0 |  |
Commercial | 30 to 59 Days Past Due | Commercial real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 0 |  | 0 |
Commercial | 30 to 59 Days Past Due | Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 0 |  | 0 |
Commercial | 30 to 59 Days Past Due | Commercial construction |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 0 |  | 19 |
Commercial | 30 to 59 Days Past Due | Business banking |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 1,191 |  | 1,614 |
Commercial | 60 to 89 Days Past Due | Commercial real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 0 |  | 0 |
Commercial | 60 to 89 Days Past Due | Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 0 |  | 0 |
Commercial | 60 to 89 Days Past Due | Commercial construction |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 0 |  | 3,580 |
Commercial | 60 to 89 Days Past Due | Business banking |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 30 |  | 379 |
Commercial | 90 Days Past Due | Commercial real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 0 |  | 0 |
Commercial | 90 Days Past Due | Commercial and industrial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 0 |  | 0 |
Commercial | 90 Days Past Due | Commercial construction |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 0 |  | 0 |
Commercial | 90 Days Past Due | Business banking |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 0 |  | 371 |
Consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 1,506,485 |  | 1,552,153 |
Consumer | Business banking |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total | 321,800 |  | 303,900 |
Consumer | Consumer real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Current | 1,094,601 |  | 1,153,028 |
Past due | 9,498 |  | 14,304 |
Non - performing | 7,949 |  | 11,117 | 6,063
Total | 1,104,099 |  | 1,167,332 |
Restructured loans | 568 | 91 |  |
Consumer | Other consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Current | 78,314 |  | 80,583 |
Past due | 2,304 |  | 302 |
Non - performing | 2,163 |  | 96 | $ 1,127
Total | 80,618 |  | 80,885 |
Restructured loans | 1 | $ 0 |  |
Consumer | 30 to 59 Days Past Due | Consumer real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 1,444 |  | 1,087 |
Consumer | 30 to 59 Days Past Due | Other consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 102 |  | 168 |
Consumer | 60 to 89 Days Past Due | Consumer real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 104 |  | 1,968 |
Consumer | 60 to 89 Days Past Due | Other consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 39 |  | 37 |
Consumer | 90 Days Past Due | Consumer real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | 0 |  | 132 |
Consumer | 90 Days Past Due | Other consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Past due | $ 0 |  | $ 0 |

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