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Note 8 - Loans (Tables) | 9 Months Ended
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Sep. 30, 2021
Notes Tables |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] |
|  | September 30, 2021 |  |  | December 31, 2020 |
|  | (In thousands) |
Commercial loans |  | $ | 2,871,693 |  |  | $ | 2,836,833 |
Residential mortgage loans |  |  | 4,144,789 |  |  |  | 4,145,389 |
Commercial mortgage loans |  |  | 7,835,528 |  |  |  | 7,555,027 |
Real estate construction loans |  |  | 688,195 |  |  |  | 679,492 |
Equity lines |  |  | 433,206 |  |  |  | 424,555 |
Installment and other loans |  |  | 3,370 |  |  |  | 3,100 |
Gross loans |  | $ | 15,976,781 |  |  | $ | 15,644,396 |
Allowance for loan losses |  |  | (131,945 | ) |  |  | (166,538 | )
Unamortized deferred loan fees, net |  |  | (3,835 | ) |  |  | (2,494 | )
Total loans, net |  | $ | 15,841,001 |  |  | $ | 15,475,364 |
Impaired Financing Receivables [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, 2021 |  |  | September 30, 2021 |
|  | Average Recorded Investment |  |  | Interest Income Recognized |  |  | Average Recorded Investment |  |  | Interest Income Recognized |
|  | (In thousands) |
Commercial loans |  | $ | 16,379 |  |  | $ | — |  |  | $ | 22,989 |  |  | $ | — |
Real estate construction loans |  |  | 4,548 |  |  |  | 50 |  |  |  | 4,310 |  |  |  | 220 |
Commercial mortgage loans |  |  | 37,017 |  |  |  | 140 |  |  |  | 37,964 |  |  |  | 297 |
Residential mortgage loans and equity lines |  |  | 9,831 |  |  |  | 7 |  |  |  | 8,976 |  |  |  | 23 |
Total non-accrual loans |  | $ | 67,775 |  |  | $ | 197 |  |  | $ | 74,239 |  |  | $ | 540 |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, 2020 |  |  | September 30, 2020 |
|  | Average Recorded Investment |  |  | Interest Income Recognized |  |  | Average Recorded Investment |  |  | Interest Income Recognized |
|  | (In thousands) |
Commercial loans |  | $ | 30,346 |  |  | $ | 148 |  |  | $ | 30,723 |  |  | $ | 242 |
Real estate construction loans |  |  | 4,368 |  |  |  | 98 |  |  |  | 4,444 |  |  |  | 245 |
Commercial mortgage loans |  |  | 40,708 |  |  |  | 268 |  |  |  | 37,730 |  |  |  | 966 |
Residential mortgage loans and equity lines |  |  | 16,609 |  |  |  | 74 |  |  |  | 15,240 |  |  |  | 200 |
Total impaired loans |  | $ | 92,031 |  |  | $ | 588 |  |  | $ | 88,137 |  |  | $ | 1,653 |
Schedule Of Impaired Loans And Related Allowance And Charge Off [Table Text Block] |
|  | September 30, 2021 |
|  | Unpaid Principal Balance |  |  | Recorded Investment |  |  | Allowance |
|  | (In thousands) |
With no allocated allowance |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans |  | $ | 13,897 |  |  | $ | 10,442 |  |  | $ | — |
Real estate construction loans |  |  | 7,201 |  |  |  | 5,491 |  |  |  | — |
Commercial mortgage loans |  |  | 19,356 |  |  |  | 18,407 |  |  |  | — |
Residential mortgage loans and equity lines |  |  | 6,989 |  |  |  | 6,813 |  |  |  | — |
Subtotal |  | $ | 47,443 |  |  | $ | 41,153 |  |  | $ | — |
With allocated allowance |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans |  | $ | 16,739 |  |  | $ | 6,656 |  |  | $ | 1,301 |
Commercial mortgage loans |  |  | 18,664 |  |  |  | 18,561 |  |  |  | 5,229 |
Residential mortgage loans and equity lines |  |  | 2,892 |  |  |  | 2,312 |  |  |  | — |
Subtotal |  | $ | 38,295 |  |  | $ | 27,529 |  |  | $ | 6,530 |
Total non-accrual loans |  | $ | 85,738 |  |  | $ | 68,682 |  |  | $ | 6,530 |
|  | December 31, 2020 |
|  | Unpaid Principal Balance |  |  | Recorded Investment |  |  | Allowance |
|  | (In thousands) |
With no allocated allowance |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans |  | $ | 23,784 |  |  | $ | 20,698 |  |  | $ | — |
Real estate construction loans |  |  | 5,776 |  |  |  | 4,286 |  |  |  | — |
Commercial mortgage loans |  |  | 22,877 |  |  |  | 22,287 |  |  |  | — |
Residential mortgage loans and equity lines |  |  | 6,379 |  |  |  | 6,307 |  |  |  | — |
Subtotal |  | $ | 58,816 |  |  | $ | 53,578 |  |  | $ | — |
With allocated allowance |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans |  | $ | 13,703 |  |  | $ | 6,372 |  |  | $ | 1,030 |
Commercial mortgage loans |  |  | 31,134 |  |  |  | 31,003 |  |  |  | 5,254 |
Residential mortgage loans and equity lines |  |  | 5,005 |  |  |  | 4,452 |  |  |  | 145 |
Subtotal |  | $ | 49,842 |  |  | $ | 41,827 |  |  | $ | 6,429 |
Total impaired loans |  | $ | 108,658 |  |  | $ | 95,405 |  |  | $ | 6,429 |
Financing Receivable, Past Due [Table Text Block] |
|  | September 30, 2021 |
|  | 30-59 Days Past Due |  |  | 60-89 Days Past Due |  |  | 90 Days or More Past Due |  |  | Non-accrual Loans |  |  | Total Past Due |  |  | Loans Not Past Due |  |  | Total |
|  | (In thousands) |
Commercial loans |  | $ | 15,391 |  |  | $ | 2,326 |  |  | $ | 2,861 |  |  | $ | 17,098 |  |  | $ | 37,676 |  |  | $ | 2,834,017 |  |  | $ | 2,871,693 |
Real estate construction loans |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 5,491 |  |  |  | 5,491 |  |  |  | 682,704 |  |  |  | 688,195 |
Commercial mortgage loans |  |  | 458 |  |  |  | — |  |  |  | 1,472 |  |  |  | 36,968 |  |  |  | 38,898 |  |  |  | 7,796,630 |  |  |  | 7,835,528 |
Residential mortgage loans and equity lines |  |  | — |  |  |  | 2,451 |  |  |  | — |  |  |  | 9,125 |  |  |  | 11,576 |  |  |  | 4,566,419 |  |  |  | 4,577,995 |
Installment and other loans |  |  | 8 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 8 |  |  |  | 3,362 |  |  |  | 3,370 |
Total loans |  | $ | 15,857 |  |  | $ | 4,777 |  |  | $ | 4,333 |  |  | $ | 68,682 |  |  | $ | 93,649 |  |  | $ | 15,883,132 |  |  | $ | 15,976,781 |
|  | December 31, 2020 |
|  | 30-59 Days Past Due |  |  | 60-89 Days Past Due |  |  | 90 Days or More Past Due |  |  | Non-accrual Loans |  |  | Total Past Due |  |  | Loans Not Past Due |  |  | Total |
|  | (In thousands) |
Commercial loans |  | $ | 52,601 |  |  | $ | 3,182 |  |  | $ | 2,947 |  |  | $ | 23,087 |  |  | $ | 81,817 |  |  | $ | 2,755,016 |  |  | $ | 2,836,833 |
Real estate construction loans |  |  | 6,257 |  |  |  | — |  |  |  | — |  |  |  | 4,286 |  |  |  | 10,543 |  |  |  | 668,949 |  |  |  | 679,492 |
Commercial mortgage loans |  |  | 45,186 |  |  |  | 18,069 |  |  |  | 2,035 |  |  |  | 33,715 |  |  |  | 99,005 |  |  |  | 7,456,022 |  |  |  | 7,555,027 |
Residential mortgage loans and equity lines |  |  | 14,315 |  |  |  | 4,223 |  |  |  | — |  |  |  | 6,596 |  |  |  | 25,134 |  |  |  | 4,544,810 |  |  |  | 4,569,944 |
Installment and other loans |  |  | 43 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 43 |  |  |  | 3,057 |  |  |  | 3,100 |
Total loans |  | $ | 118,402 |  |  | $ | 25,474 |  |  | $ | 4,982 |  |  | $ | 67,684 |  |  | $ | 216,542 |  |  | $ | 15,427,854 |  |  | $ | 15,644,396 |
Schedule Of Troubled Debt Restructurings [Table Text Block] |
|  | Three Months Ended September 30, 2021 |  |  | September 30, 2021 |
|  | No. of Contracts |  |  | Pre-Modification Outstanding Recorded Investment |  |  | Post-Modification Outstanding Recorded Investment |  |  | Charge-offs |  |  | Specific Reserve |
|  | (In thousands) |
Commercial loans |  |  | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Residential mortgage loans and equity lines |  |  | 1 |  |  |  | 479 |  |  |  | 479 |  |  |  | — |  |  |  | 14 |
Total |  |  | 1 |  |  | $ | 479 |  |  | $ | 479 |  |  | $ | — |  |  | $ | 14 |
|  | Three Months Ended September 30, 2020 |  |  | September 30, 2020 |
|  | No. of Contracts |  |  | Pre-Modification Outstanding Recorded Investment |  |  | Post-Modification Outstanding Recorded Investment |  |  | Charge-offs |  |  | Specific Reserve |
|  | (In thousands) |
Commercial loans |  |  | 2 |  |  | $ | 2,983 |  |  | $ | 2,983 |  |  | $ | — |  |  | $ | 203 |
Residential mortgage loans and equity lines |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  |  | 2 |  |  | $ | 2,983 |  |  | $ | 2,983 |  |  | $ | — |  |  | $ | 203 |
|  | Nine Months Ended September 30, 2021 |  |  | September 30, 2021 |
|  | No. of Contracts |  |  | Pre-Modification Outstanding Recorded Investment |  |  | Post-Modification Outstanding Recorded Investment |  |  | Charge-offs |  |  | Specific Reserve |
|  | (In thousands) |
Commercial loans |  |  | 1 |  |  | $ | 686 |  |  | $ | 686 |  |  | $ | — |  |  | $ | — |
Residential mortgage loans and equity lines |  |  | 1 |  |  |  | 479 |  |  |  | 479 |  |  |  | — |  |  |  | 14 |
Total |  |  | 2 |  |  | $ | 1,165 |  |  | $ | 1,165 |  |  | $ | — |  |  | $ | 14 |
|  | Nine Months Ended September 30, 2020 |  |  | September 30, 2020 |
|  | No. of Contracts |  |  | Pre-Modification Outstanding Recorded Investment |  |  | Post-Modification Outstanding Recorded Investment |  |  | Charge-offs |  |  | Specific Reserve |
|  | (In thousands) |
Commercial loans |  |  | 5 |  |  | $ | 5,417 |  |  | $ | 5,417 |  |  | $ | — |  |  | $ | 204 |
Residential mortgage loans and equity lines |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  |  | 5 |  |  | $ | 5,417 |  |  | $ | 5,417 |  |  | $ | — |  |  | $ | 204 |
Financing Receivable, Troubled Debt Restructuring [Table Text Block] |
|  | September 30, 2021 |
|  | Payment Deferral |  |  | Rate Reduction |  |  | Rate Reduction and Payment Deferral |  |  | Total |
|  | (In thousands) |
Accruing TDRs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans |  | $ | 1,453 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,453 |
Commercial mortgage loans |  |  | 441 |  |  |  | 5,552 |  |  |  | 13,114 |  |  |  | 19,107 |
Residential mortgage loans |  |  | 1,726 |  |  |  | 251 |  |  |  | 1,869 |  |  |  | 3,846 |
Total accruing TDRs |  | $ | 3,620 |  |  | $ | 5,803 |  |  | $ | 14,983 |  |  | $ | 24,406 |
|  | December 31, 2020 |
|  | Payment Deferral |  |  | Rate Reduction |  |  | Rate Reduction and Payment Deferral |  |  | Total |
|  | (In thousands) |
Accruing TDRs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans |  | $ | 3,983 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,983 |
Commercial mortgage loans |  |  | 515 |  |  |  | 5,635 |  |  |  | 13,425 |  |  |  | 19,575 |
Residential mortgage loans |  |  | 1,724 |  |  |  | 275 |  |  |  | 2,164 |  |  |  | 4,163 |
Total accruing TDRs |  | $ | 6,222 |  |  | $ | 5,910 |  |  | $ | 15,589 |  |  | $ | 27,721 |
Non Accrual Troubled Debt Restructurings [Table Text Block] |
|  | September 30, 2021 |
|  | Payment Deferral |  |  | Rate Reduction |  |  | Rate Reduction and Payment Deferral |  |  | Total |
|  | (In thousands) |
Non-accrual TDRs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans |  | $ | 7,784 |  |  | $ | — |  |  | $ | — |  |  | $ | 7,784 |
Commercial mortgage loans |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Residential mortgage loans |  |  | 500 |  |  |  | — |  |  |  | — |  |  |  | 500 |
Total non-accrual TDRs |  | $ | 8,284 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,284 |
|  | December 31, 2020 |
|  | Payment Deferral |  |  | Rate Reduction |  |  | Rate Reduction and Payment Deferral |  |  | Total |
|  | (In thousands) |
Non-accrual TDRs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans |  | $ | 8,462 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,462 |
Residential mortgage loans |  |  | 523 |  |  |  | — |  |  |  | — |  |  |  | 523 |
Total non-accrual TDRs |  | $ | 8,985 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,985 |
Activity Within The Troubled Debt Resturings [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
|  | (In thousands) |
Accruing TDRs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 27,261 |  |  | $ | 31,671 |  |  | $ | 27,721 |  |  | $ | 35,336 |
New restructurings |  |  | (208 | ) |  |  | 2,983 |  |  |  | 479 |  |  |  | 5,417 |
Restructured loans restored to accrual status |  |  | — |  |  |  | 263 |  |  |  | — |  |  |  | 263 |
Charge-offs |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Payments |  |  | (2,406 | ) |  |  | (6,330 | ) |  |  | (3,553 | ) |  |  | (12,429 | )
Restructured loans placed on non-accrual status |  |  | (241 | ) |  |  | — |  |  |  | (241 | ) |  |  | — |
Ending balance |  | $ | 24,406 |  |  | $ | 28,587 |  |  | $ | 24,406 |  |  | $ | 28,587 |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
|  | (In thousands) |
Non-accrual TDRs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 8,402 |  |  | $ | 12,670 |  |  | $ | 8,985 |  |  | $ | 18,048 |
New restructurings |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Restructured loans placed on non-accrual status |  |  | 234 |  |  |  | — |  |  |  | 241 |  |  |  | — |
Charge-offs |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (4,970 | )
Payments |  |  | (352 | ) |  |  | (2,488 | ) |  |  | (710 | ) |  |  | (2,896 | )
Restructured loans restored to accrual status |  |  | — |  |  |  | (263 | ) |  |  | (232 | ) |  |  | (263 | )
Ending balance |  | $ | 8,284 |  |  | $ | 9,919 |  |  | $ | 8,284 |  |  | $ | 9,919 |
Financing Receivable Credit Quality Indicators [Table Text Block] |
|  | December 31, 2020 |
|  | Pass/Watch |  |  | Special Mention |  |  | Substandard |  |  | Doubtful |  |  | Total |
|  | (In thousands) |
Commercial loans |  | $ | 2,581,128 |  |  | $ | 141,344 |  |  | $ | 108,788 |  |  | $ | 5,573 |  |  | $ | 2,836,833 |
Real estate construction loans |  |  | 593,196 |  |  |  | 82,010 |  |  |  | 4,286 |  |  |  | — |  |  |  | 679,492 |
Commercial mortgage loans |  |  | 7,202,568 |  |  |  | 186,283 |  |  |  | 166,176 |  |  |  | — |  |  |  | 7,555,027 |
Residential mortgage loans and equity lines |  |  | 4,547,052 |  |  |  | 11,647 |  |  |  | 11,245 |  |  |  | — |  |  |  | 4,569,944 |
Installment and other loans |  |  | 3,100 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,100 |
Total gross loans |  | $ | 14,927,044 |  |  | $ | 421,284 |  |  | $ | 290,495 |  |  | $ | 5,573 |  |  | $ | 15,644,396 |
Loan Held for Investment by Loan Portfolio Segments, Internal Risk Ratings and Vintage Year [Table Text Block] |
|  | Loans Amortized Cost Basis by Origination Year |  |  |  |  |  |  |  |  |  |  |  |  |
September 30, 2021 |  | 2021 |  |  | 2020 |  |  | 2019 |  |  | 2018 |  |  | 2017 |  |  | Prior |  |  | Revolving Loans |  |  | Revolving Converted to Term Loans |  |  | Total |
|  | (In thousands) |
Commercial loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pass/Watch |  | $ | 552,079 |  |  | $ | 309,944 |  |  | $ | 245,936 |  |  | $ | 188,790 |  |  | $ | 87,579 |  |  | $ | 69,354 |  |  | $ | 1,266,946 |  |  | $ | 7,650 |  |  | $ | 2,728,278 |
Special Mention |  |  | 93 |  |  |  | 570 |  |  |  | 4,506 |  |  |  | 1,703 |  |  |  | 2,871 |  |  |  | — |  |  |  | 22,073 |  |  |  | 89 |  |  |  | 31,905 |
Substandard |  |  | 31 |  |  |  | 6,286 |  |  |  | 21,896 |  |  |  | 16,829 |  |  |  | 13,077 |  |  |  | 5,319 |  |  |  | 39,457 |  |  |  | 6,089 |  |  |  | 108,984 |
Doubtful |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 901 |  |  |  | — |  |  |  | 901 |
Loss |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 552,203 |  |  | $ | 316,800 |  |  | $ | 272,338 |  |  | $ | 207,322 |  |  | $ | 103,527 |  |  | $ | 74,673 |  |  | $ | 1,329,377 |  |  | $ | 13,828 |  |  | $ | 2,870,068 |
YTD period charge-offs |  | $ | — |  |  | $ | 927 |  |  | $ | 507 |  |  | $ | 366 |  |  | $ | — |  |  | $ | 50 |  |  | $ | 17,649 |  |  | $ | — |  |  | $ | 19,499 |
YTD period recoveries |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (75 | ) |  |  | — |  |  |  | (169 | ) |  |  | (1,301 | ) |  |  | — |  |  |  | (1,545 | )
Net |  | $ | — |  |  | $ | 927 |  |  | $ | 507 |  |  | $ | 291 |  |  | $ | — |  |  | $ | (119 | ) |  | $ | 16,348 |  |  | $ | — |  |  | $ | 17,954 |
Real estate construction loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pass/Watch |  | $ | 160,357 |  |  | $ | 213,737 |  |  | $ | 152,626 |  |  | $ | 64,908 |  |  | $ | 30,272 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 621,900 |
Special Mention |  |  | 4,772 |  |  |  | 22,233 |  |  |  | 11,800 |  |  |  | 17,306 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 56,111 |
Substandard |  |  | — |  |  |  | — |  |  |  | 3,344 |  |  |  | — |  |  |  | — |  |  |  | 4,066 |  |  |  | — |  |  |  | — |  |  |  | 7,410 |
Doubtful |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Loss |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 165,129 |  |  | $ | 235,970 |  |  | $ | 167,770 |  |  | $ | 82,214 |  |  | $ | 30,272 |  |  | $ | 4,066 |  |  | $ | — |  |  | $ | — |  |  | $ | 685,421 |
YTD period charge-offs |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
YTD period recoveries |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (76 | ) |  |  | — |  |  |  | — |  |  |  | (76 | )
Net |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (76 | ) |  | $ | — |  |  | $ | — |  |  | $ | (76 | )
Commercial mortgage loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pass/Watch |  | $ | 1,256,784 |  |  | $ | 1,266,048 |  |  | $ | 1,284,803 |  |  | $ | 1,089,005 |  |  | $ | 813,707 |  |  | $ | 1,473,901 |  |  | $ | 177,509 |  |  | $ | — |  |  | $ | 7,361,757 |
Special Mention |  |  | 18,826 |  |  |  | 52,416 |  |  |  | 45,281 |  |  |  | 104,703 |  |  |  | 42,329 |  |  |  | 82,614 |  |  |  | 2,499 |  |  |  | — |  |  |  | 348,668 |
Substandard |  |  | 1,116 |  |  |  | 235 |  |  |  | 10,906 |  |  |  | 46,149 |  |  |  | 1,590 |  |  |  | 62,095 |  |  |  | 856 |  |  |  | — |  |  |  | 122,947 |
Doubtful |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Loss |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 1,276,726 |  |  | $ | 1,318,699 |  |  | $ | 1,340,990 |  |  | $ | 1,239,857 |  |  | $ | 857,626 |  |  | $ | 1,618,610 |  |  | $ | 180,864 |  |  | $ | — |  |  | $ | 7,833,372 |
YTD period charge-offs |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
YTD period recoveries |  |  | — |  |  |  | — |  |  |  | (180 | ) |  |  | — |  |  |  | — |  |  |  | (21 | ) |  |  | (83 | ) |  |  | — |  |  |  | (284 | )
Net |  | $ | — |  |  | $ | — |  |  | $ | (180 | ) |  | $ | — |  |  | $ | — |  |  | $ | (21 | ) |  | $ | (83 | ) |  | $ | — |  |  | $ | (284 | )
Residential mortgage loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pass/Watch |  | $ | 722,013 |  |  | $ | 663,292 |  |  | $ | 731,803 |  |  | $ | 544,362 |  |  | $ | 474,271 |  |  | $ | 992,504 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,128,245 |
Special Mention |  |  | — |  |  |  | 140 |  |  |  | 4,369 |  |  |  | 1,448 |  |  |  | 839 |  |  |  | 589 |  |  |  | — |  |  |  | — |  |  |  | 7,385 |
Substandard |  |  | 479 |  |  |  | 167 |  |  |  | 1,921 |  |  |  | 2,520 |  |  |  | 1,167 |  |  |  | 4,466 |  |  |  | — |  |  |  | — |  |  |  | 10,720 |
Doubtful |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Loss |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 722,492 |  |  | $ | 663,599 |  |  | $ | 738,093 |  |  | $ | 548,330 |  |  | $ | 476,277 |  |  | $ | 997,559 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,146,350 |
YTD period charge-offs |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 3 |
YTD period recoveries |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (208 | ) |  |  | — |  |  |  | — |  |  |  | (208 | )
Net |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 3 |  |  | $ | (208 | ) |  | $ | — |  |  | $ | — |  |  | $ | (205 | )
Equity lines |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pass/Watch |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 7 |  |  | $ | 400,991 |  |  | $ | 31,677 |  |  | $ | 432,675 |
Special Mention |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Substandard |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,240 |  |  |  | 450 |  |  |  | 1,690 |
Doubtful |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Loss |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 7 |  |  | $ | 402,231 |  |  | $ | 32,127 |  |  | $ | 434,365 |
YTD period charge-offs |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
YTD period recoveries |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (8 | ) |  |  | (58 | ) |  |  | (66 | )
Net |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (8 | ) |  | $ | (58 | ) |  | $ | (66 | )
Installment and other loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pass/Watch |  | $ | 2,120 |  |  | $ | 1,250 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 3,370 |
Special Mention |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Substandard |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Doubtful |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Loss |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 2,120 |  |  | $ | 1,250 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 3,370 |
YTD period charge-offs |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
YTD period recoveries |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Net |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Total loans |  | $ | 2,718,670 |  |  | $ | 2,536,318 |  |  | $ | 2,519,191 |  |  | $ | 2,077,723 |  |  | $ | 1,467,702 |  |  | $ | 2,694,915 |  |  | $ | 1,912,472 |  |  | $ | 45,955 |  |  | $ | 15,972,946 |
Net charge-offs/(recoveries) |  | $ | — |  |  | $ | 927 |  |  | $ | 327 |  |  | $ | 291 |  |  | $ | 3 |  |  | $ | (424 | ) |  | $ | 16,257 |  |  | $ | (58 | ) |  | $ | 17,323 |
Financing Receivable, Allowance for Credit Loss [Table Text Block] |
Three months ended September 30, 2021 and 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Residential |  |  |  |  |  |  |  |  |
|  |  |  |  |  | Real Estate |  |  | Commercial |  |  | Mortgage Loans |  |  | Installment |  |  |  |  |
|  | Commercial |  |  | Construction |  |  | Mortgage |  |  | and |  |  | and Other |  |  |  |  |
|  | Loans |  |  | Loans |  |  | Loans |  |  | Equity Lines |  |  | Loans |  |  | Total |
|  | (In thousands) |
June 30, 2021 Ending Balance |  | $ | 40,067 |  |  | $ | 6,119 |  |  | $ | 58,026 |  |  | $ | 27,043 |  |  | $ | 1 |  |  | $ | 131,256 |
Provision/(reversal) for possible credit losses |  |  | 674 |  |  |  | 149 |  |  |  | 2,786 |  |  |  | (609 | ) |  |  | — |  |  |  | 3,000 |
Charge-offs |  |  | (2,649 | ) |  |  | — |  |  |  | — |  |  |  | (3 | ) |  |  | — |  |  |  | (2,652 | )
Recoveries |  |  | 121 |  |  |  | 76 |  |  |  | 144 |  |  |  | — |  |  |  | — |  |  |  | 341 |
Net (charge-offs)/recoveries |  |  | (2,528 | ) |  |  | 76 |  |  |  | 144 |  |  |  | (3 | ) |  |  | — |  |  |  | (2,311 | )
September 30, 2021 Ending Balance |  | $ | 38,213 |  |  | $ | 6,344 |  |  | $ | 60,956 |  |  | $ | 26,431 |  |  | $ | 1 |  |  | $ | 131,945 |
Allowance for unfunded credit commitments June 30, 2021 |  | $ | 4,388 |  |  | $ | 3,581 |  |  | $ | 81 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,050 |
Provision/(reversal) for possible credit losses |  |  | 329 |  |  |  | (396 | ) |  |  | 117 |  |  |  | — |  |  |  | — |  |  |  | 50 |
Allowance for unfunded credit commitments September 30, 2021 |  | $ | 4,717 |  |  | $ | 3,185 |  |  | $ | 198 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,100 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Residential |  |  |  |  |  |  |  |  |
|  |  |  |  |  | Real Estate |  |  | Commercial |  |  | Mortgage Loans |  |  | Installment |  |  |  |  |
|  | Commercial |  |  | Construction |  |  | Mortgage |  |  | and |  |  | and Other |  |  |  |  |
|  | Loans |  |  | Loans |  |  | Loans |  |  | Equity Lines |  |  | Loans |  |  | Total |
|  | (In thousands) |
June 30, 2020 Ending Balance |  | $ | 82,256 |  |  | $ | 26,700 |  |  | $ | 41,132 |  |  | $ | 19,592 |  |  | $ | — |  |  | $ | 169,680 |
Provision/(reversal) for possible credit losses |  |  | 298 |  |  |  | 6,012 |  |  |  | 5,438 |  |  |  | 752 |  |  |  | — |  |  |  | 12,500 |
Charge-offs |  |  | (6,956 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (6,956 | )
Recoveries |  |  | 3,796 |  |  |  | — |  |  |  | 95 |  |  |  | 15 |  |  |  | — |  |  |  | 3,906 |
Net (charge-offs)/recoveries |  |  | (3,160 | ) |  |  | — |  |  |  | 95 |  |  |  | 15 |  |  |  | — |  |  |  | (3,050 | )
September 30, 2020 Ending Balance |  | $ | 79,394 |  |  | $ | 32,712 |  |  | $ | 46,665 |  |  | $ | 20,359 |  |  | $ | — |  |  | $ | 179,130 |
Nine months ended September 30, 2021 and 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Residential |  |  |  |  |  |  |  |  |
|  |  |  |  |  | Real Estate |  |  | Commercial |  |  | Mortgage Loans |  |  | Installment |  |  |  |  |
|  | Commercial |  |  | Construction |  |  | Mortgage |  |  | and |  |  | and Other |  |  |  |  |
|  | Loans |  |  | Loans |  |  | Loans |  |  | Equity Lines |  |  | Loans |  |  | Total |
|  | (In thousands) |
2021 Beginning Balance |  | $ | 68,742 |  |  | $ | 30,854 |  |  | $ | 49,205 |  |  | $ | 17,737 |  |  | $ | — |  |  | $ | 166,538 |
Impact of ASU 2016-13 adoption |  |  | (31,466 | ) |  |  | (24,307 | ) |  |  | 34,993 |  |  |  | 19,211 |  |  |  | 9 |  |  |  | (1,560 | )
Allowance for loan losses, January 1, 2021 |  |  | 37,276 |  |  |  | 6,547 |  |  |  | 84,198 |  |  |  | 36,948 |  |  |  | 9 |  |  |  | 164,978 |
Provision/(reversal) for possible credit losses |  |  | 18,891 |  |  |  | (279 | ) |  |  | (23,526 | ) |  |  | (10,788 | ) |  |  | (8 | ) |  |  | (15,710 | )
Charge-offs |  |  | (19,499 | ) |  |  | — |  |  |  | — |  |  |  | (3 | ) |  |  | — |  |  |  | (19,502 | )
Recoveries |  |  | 1,545 |  |  |  | 76 |  |  |  | 284 |  |  |  | 274 |  |  |  | — |  |  |  | 2,179 |
Net (charge-offs)/recoveries |  |  | (17,954 | ) |  |  | 76 |  |  |  | 284 |  |  |  | 271 |  |  |  | — |  |  |  | (17,323 | )
September 30, 2021 Ending Balance |  | $ | 38,213 |  |  | $ | 6,344 |  |  | $ | 60,956 |  |  | $ | 26,431 |  |  | $ | 1 |  |  | $ | 131,945 |
Allowance for unfunded credit commitments December 31, 2020 |  | $ | 4,802 |  |  | $ | 690 |  |  | $ | 101 |  |  | $ | 284 |  |  | $ | 3 |  |  | $ | 5,880 |
Impact of ASU 2016-13 adoption |  |  | 3,236 |  |  |  | 3,135 |  |  |  | (66 | ) |  |  | (284 | ) |  |  | (3 | ) |  |  | 6,018 |
Allowance for loan losses, January 1, 2021 |  |  | 8,038 |  |  |  | 3,825 |  |  |  | 35 |  |  |  | — |  |  |  | — |  |  |  | 11,898 |
Provision/(reversal) for possible credit losses |  |  | (3,321 | ) |  |  | (640 | ) |  |  | 163 |  |  |  | — |  |  |  | — |  |  |  | (3,798 | )
Allowance for unfunded credit commitments September 30, 2021 |  | $ | 4,717 |  |  | $ | 3,185 |  |  | $ | 198 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,100 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Residential |  |  |  |  |  |  |  |  |
|  |  |  |  |  | Real Estate |  |  | Commercial |  |  | Mortgage Loans |  |  | Installment |  |  |  |  |
|  | Commercial |  |  | Construction |  |  | Mortgage |  |  | and |  |  | and Other |  |  |  |  |
|  | Loans |  |  | Loans |  |  | Loans |  |  | Equity Lines |  |  | Loans |  |  | Total |
|  | (In thousands) |
2020 Beginning Balance |  | $ | 57,021 |  |  | $ | 19,474 |  |  | $ | 33,602 |  |  | $ | 13,108 |  |  | $ | 19 |  |  | $ | 123,224 |
Provision/(reversal) for possible credit losses |  |  | 29,402 |  |  |  | 13,238 |  |  |  | 12,718 |  |  |  | 7,161 |  |  |  | (19 | ) |  |  | 62,500 |
Charge-offs |  |  | (13,383 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (13,383 | )
Recoveries |  |  | 6,354 |  |  |  | — |  |  |  | 345 |  |  |  | 90 |  |  |  | — |  |  |  | 6,789 |
Net (charge-offs)/recoveries |  |  | (7,029 | ) |  |  | — |  |  |  | 345 |  |  |  | 90 |  |  |  | — |  |  |  | (6,594 | )
September 30, 2020 Ending Balance |  | $ | 79,394 |  |  | $ | 32,712 |  |  | $ | 46,665 |  |  | $ | 20,359 |  |  | $ | — |  |  | $ | 179,130 |
Reserve for impaired loans |  | $ | 7,704 |  |  | $ | — |  |  | $ | 582 |  |  | $ | 209 |  |  | $ | — |  |  | $ | 8,495 |
Reserve for non-impaired loans |  | $ | 71,690 |  |  | $ | 32,712 |  |  | $ | 46,083 |  |  | $ | 20,150 |  |  | $ | — |  |  | $ | 170,635 |
Reserve for off-balance sheet credit commitments |  | $ | 4,297 |  |  | $ | 896 |  |  | $ | 172 |  |  | $ | 294 |  |  | $ | 4 |  |  | $ | 5,663 |
Impairment Method [Member] |
Notes Tables |
Impaired Financing Receivables [Table Text Block] |
|  | December 31, 2020 |
|  |  |  |  |  | Real Estate |  |  | Commercial |  |  | Residential |  |  | Installment |  |  |  |  |
|  | Commercial |  |  | Construction |  |  | Mortgage |  |  | Mortgage Loans |  |  | and |  |  |  |  |
|  | Loans |  |  | Loans |  |  | Loans |  |  | and Equity Lines |  |  | Other Loans |  |  | Total |
|  | (In thousands) |
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance |  | $ | 1,030 |  |  | $ | — |  |  | $ | 5,254 |  |  | $ | 145 |  |  | $ | — |  |  | $ | 6,429 |
Balance |  | $ | 27,070 |  |  | $ | 4,286 |  |  | $ | 53,289 |  |  | $ | 10,760 |  |  | $ | — |  |  | $ | 95,405 |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance |  | $ | 67,712 |  |  | $ | 30,854 |  |  | $ | 43,951 |  |  | $ | 17,592 |  |  | $ | — |  |  | $ | 160,109 |
Balance |  | $ | 2,809,763 |  |  | $ | 675,206 |  |  | $ | 7,501,738 |  |  | $ | 4,559,184 |  |  | $ | 3,100 |  |  | $ | 15,548,991 |
Total allowance |  | $ | 68,742 |  |  | $ | 30,854 |  |  | $ | 49,205 |  |  | $ | 17,737 |  |  | $ | — |  |  | $ | 166,538 |
Total balance |  | $ | 2,836,833 |  |  | $ | 679,492 |  |  | $ | 7,555,027 |  |  | $ | 4,569,944 |  |  | $ | 3,100 |  |  | $ | 15,644,396 |

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- Definition Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953659-111524 + Details
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- Definition Tabular disclosure of impaired financing receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
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- Definition Tabular disclosure of aging analysis for financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524 + Details
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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524 + Details
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