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Loans and Allowance for Credit Losses (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
​ | ​ | (In thousands)
Multi-family residential | ​ | $ | 2,533,952 | ​ | $ | 2,238,591
Commercial real estate | ​ |  | 1,754,754 | ​ |  | 1,582,008
One-to-four family ― mixed-use property | ​ |  | 602,981 | ​ |  | 592,471
One-to-four family ― residential | ​ |  | 245,211 | ​ |  | 188,216
Co-operative apartments | ​ |  | 8,051 | ​ |  | 8,663
Construction | ​ |  | 83,322 | ​ |  | 67,754
Small Business Administration (1) | ​ |  | 167,376 | ​ |  | 14,445
Taxi medallion | ​ |  | 2,757 | ​ |  | 3,309
Commercial business and other | ​ |  | 1,303,225 | ​ |  | 1,061,478
Gross loans | ​ |  | 6,701,629 | ​ |  | 5,756,935
Net unamortized premiums and unearned loan fees | ​ |  | 3,045 | ​ |  | 15,271
Total loans, net of fees and costs | ​ | $ | 6,704,674 | ​ | $ | 5,772,206
​
| (1) | Includes $151.9 million of SBA PPP loans at December 31, 2020.
​
Schedule of Debtor Troubled Debt Restructuring, Current Period [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended | ​ | ​ | ​
​ | ​ | December 31, 2020 | ​ | ​ | ​
(Dollars in thousands) |  | Number |  | Balance |  | Modification description |
​ | ​ | ​ | ​ | ​ | ​ |  | ​ |
Commercial real estate | ​ | 1 | ​ | $ | 7,583 | ​ | Loan received a below market interest rate and had an amortization extension | ​
One-to-four family - mixed-use property | ​ | 1 | ​ | ​ | 270 | ​ | Loan received a below market interest rate. | ​
Total |  | 2 | ​ | $ | 7,853 |  |  |
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended | ​ | ​ | ​
​ | ​ | December 31, 2019 | ​ | ​ | ​
(Dollars in thousands) |  | Number |  | Balance |  | Modification description |
Commercial business and other |  | 3 | ​ | $ | 951 |  | Loan amortization extension. |
Total |  | 3 | ​ | $ | 951 |  |  |
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended | ​ | ​ | ​
​ | ​ | December 31, 2018 | ​ | ​ | ​
(Dollars in thousands) |  | Number |  | Balance |  | Modification description |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial business and other |  | 1 | ​ | $ | 1,620 |  | Loan amortization extension. |
Total |  | 1 | ​ | $ | 1,620 |  |  |
Schedule of Financing Receivables, Non Accrual Status [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | At or for the year December 31, 2020
(In thousands) | ​ | ​ | Non-accrual amortized cost beginning of the reporting period | ​ | ​ | Non-accrual amortized cost ending of the reporting period | ​ | ​ | Non-accrual with no related allowance | ​ | ​ | Interest income recognized | ​ | ​ | Loans ninety days or more past due and still accruing:
Multi-family residential | ​ | $ | 2,723 | ​ | $ | 2,576 | ​ | $ | 2,576 | ​ | $ | — | ​ | $ | 201
Commercial real estate | ​ | ​ | 2,714 | ​ | ​ | 1,766 | ​ | ​ | 1,766 | ​ | ​ | — | ​ | ​ | 2,547
One-to-four family - mixed-use property (1) | ​ | ​ | 1,704 | ​ | ​ | 1,706 | ​ | ​ | 1,706 | ​ | ​ | — | ​ | ​ | —
One-to-four family - residential | ​ | ​ | 9,992 | ​ | ​ | 5,313 | ​ | ​ | 5,313 | ​ | ​ | — | ​ | ​ | —
Small Business Administration | ​ | ​ | 1,169 | ​ | ​ | 1,168 | ​ | ​ | 1,168 | ​ | ​ | — | ​ | ​ | —
Taxi medallion(1) | ​ | ​ | 2,318 | ​ | ​ | 2,758 | ​ | ​ | 2,758 | ​ | ​ | — | ​ | ​ | —
Commercial business and other(1) | ​ | ​ | 7,406 | ​ | ​ | 5,660 | ​ | ​ | 1,593 | ​ | ​ | 58 | ​ | ​ | —
Total | ​ | $ | 28,026 | ​ | $ | 20,947 | ​ | $ | 16,880 | ​ | $ | 58 | ​ | $ | 2,748
(1)Included in the above analysis are non-accrual performing TDR one-to-four family – mixed-use property totaling $0.3 million, non-accrual performing TDR taxi medallion loans totaling $0.4 million December 31, 2020 and non-accrual performing TDR commercial business loans totaling $2.2 million at December 31, 2020. ​
Schedule of Interest Foregone on Non-Accrual and TDR Loans [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019 |  | 2018
​ | ​ | (In thousands)
Interest income that would have been recognized had the loans performed in accordance with their original terms | ​ | $ | 1,845 | ​ | $ | 1,546 | ​ | $ | 1,604
Less: Interest income included in the results of operations | ​ |  | 412 | ​ |  | 418 | ​ |  | 623
Total foregone interest | ​ | $ | 1,433 | ​ | $ | 1,128 | ​ | $ | 981
Past Due Financing Receivables [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Greater | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 30 - 59 Days | ​ | 60 - 89 Days | ​ | than | ​ | Total Past | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | Past Due |  | Past Due |  | 90 Days |  | Due |  | Current |  | Total Loans
Multi-family residential | ​ | $ | 7,582 | ​ | $ | 3,186 | ​ | $ | 2,777 | ​ | $ | 13,545 | ​ | $ | 2,522,432 | ​ | $ | 2,535,977
Commercial real estate | ​ |  | 17,903 | ​ |  | 5,123 | ​ |  | 4,313 | ​ |  | 27,339 | ​ |  | 1,731,045 | ​ |  | 1,758,384
One-to-four family ― mixed-use property | ​ |  | 5,673 | ​ |  | 1,132 | ​ |  | 1,433 | ​ |  | 8,238 | ​ |  | 598,647 | ​ |  | 606,885
One-to-four family ― residential | ​ |  | 3,087 | ​ |  | 805 | ​ |  | 5,313 | ​ |  | 9,205 | ​ |  | 243,486 | ​ |  | 252,691
Co-operative apartments | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | —
Construction | ​ |  | 750 | ​ |  | — | ​ |  | — | ​ |  | 750 | ​ |  | 82,411 | ​ |  | 83,161
Small Business Administration | ​ |  | 1,823 | ​ |  | — | ​ |  | 1,168 | ​ |  | 2,991 | ​ |  | 162,579 | ​ |  | 165,570
Taxi medallion | ​ |  | — | ​ |  | — | ​ |  | 2,318 | ​ |  | 2,318 | ​ |  | 279 | ​ |  | 2,597
Commercial business and other | ​ |  | 129 | ​ |  | 1,273 | ​ |  | 1,593 | ​ |  | 2,995 | ​ |  | 1,296,414 | ​ |  | 1,299,409
Total | ​ | $ | 36,947 | ​ | $ | 11,519 | ​ | $ | 18,915 | ​ | $ | 67,381 | ​ | $ | 6,637,293 | ​ | $ | 6,704,674
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Greater | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 30 - 59 Days | ​ | 60 - 89 Days | ​ | than | ​ | Total Past | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | Past Due |  | Past Due |  | 90 Days |  | Due |  | Current |  | Total Loans
Multi-family residential | ​ | $ | 4,042 | ​ | $ | 1,563 | ​ | $ | 2,741 | ​ | $ | 8,346 | ​ | $ | 2,230,245 | ​ | $ | 2,238,591
Commercial real estate | ​ |  | — | ​ |  | 4,941 | ​ |  | 367 | ​ |  | 5,308 | ​ |  | 1,576,700 | ​ |  | 1,582,008
One-to-four family - mixed-use property | ​ |  | 1,117 | ​ |  | 496 | ​ |  | 274 | ​ |  | 1,887 | ​ |  | 590,584 | ​ |  | 592,471
One-to-four family - residential | ​ |  | 720 | ​ |  | 1,022 | ​ |  | 5,139 | ​ |  | 6,881 | ​ |  | 181,335 | ​ |  | 188,216
Co-operative apartments | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 8,663 | ​ |  | 8,663
Construction loans | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 67,754 | ​ |  | 67,754
Small Business Administration | ​ |  | — | ​ |  | — | ​ |  | 1,151 | ​ |  | 1,151 | ​ |  | 13,294 | ​ |  | 14,445
Taxi medallion | ​ |  | — | ​ |  | — | ​ |  | 1,065 | ​ |  | 1,065 | ​ |  | 2,244 | ​ |  | 3,309
Commercial business and other | ​ |  | 2,340 | ​ |  | 5 | ​ |  | 1,945 | ​ |  | 4,290 | ​ |  | 1,057,188 | ​ |  | 1,061,478
Total | ​ | $ | 8,219 | ​ | $ | 8,027 | ​ | $ | 12,682 | ​ | $ | 28,928 | ​ | $ | 5,728,007 | ​ | $ | 5,756,935
Allowance for Credit Losses on Financing Receivables [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, 2020
​ |  | ​ | ​ |  | ​ | ​ |  | One-to-four |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | family - | ​ | One-to-four | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Commercial | ​ | ​ | ​
​ | ​ | Multi-family | ​ | Commercial | ​ | mixed-use | ​ | family - | ​ | Co-operative | ​ | Construction | ​ | Small Business | ​ | Taxi | ​ | business and | ​ | ​ | ​
(in thousands) | ​ | residential | ​ | real estate | ​ | property | ​ | residential | ​ | apartments | ​ | loans | ​ | Administration | ​ | medallion | ​ | other | ​ | Total
Allowance for credit losses: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Beginning balance | ​ | $ | 5,391 | ​ | $ | 4,429 | ​ | $ | 1,817 | ​ | $ | 756 | ​ | $ | — | ​ | $ | 441 | ​ | $ | 363 | ​ | $ | — | ​ | $ | 8,554 | ​ | $ | 21,751
Impact of CECL Adoption | ​ | ​ | (650) | ​ | ​ | 1,170 | ​ | ​ | (55) | ​ | ​ | (160) | ​ | ​ | — | ​ | ​ | (279) | ​ | ​ | 1,180 | ​ | ​ | — | ​ | ​ | (827) | ​ | ​ | 379
Impact of Day 1 PCD - Empire Acquisition | ​ | ​ | 444 | ​ | ​ | 587 | ​ | ​ | 183 | ​ | ​ | 158 | ​ | ​ | — | ​ | ​ | 20 | ​ | ​ | 278 | ​ | ​ | 124 | ​ | ​ | 2,305 | ​ | ​ | 4,099
Charge-off's | ​ |  | — | ​ |  | — | ​ |  | (3) | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (178) | ​ |  | (1,075) | ​ |  | (2,749) | ​ |  | (4,005)
Recoveries | ​ |  | 38 | ​ |  | — | ​ |  | 138 | ​ |  | 12 | ​ |  | — | ​ |  | — | ​ |  | 70 | ​ |  | — | ​ |  | 108 | ​ |  | 366
Provision (benefit) | ​ |  | 1,334 | ​ |  | 2,141 | ​ |  | (94) | ​ |  | 103 | ​ |  | — | ​ |  | 315 | ​ |  | 538 | ​ |  | 951 | ​ |  | 17,275 | ​ |  | 22,563
Ending balance | ​ | $ | 6,557 | ​ | $ | 8,327 | ​ | $ | 1,986 | ​ | $ | 869 | ​ | $ | — | ​ | $ | 497 | ​ | $ | 2,251 | ​ | $ | — | ​ | $ | 24,666 | ​ | $ | 45,153
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, 2019
​ |  | ​ | ​ |  | ​ | ​ |  | One-to-four |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | family - | ​ | One-to-four | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Commercial | ​ | ​ | ​
​ | ​ | Multi-family | ​ | Commercial | ​ | mixed-use | ​ | family - | ​ | Co-operative | ​ | Construction | ​ | Small Business | ​ | Taxi | ​ | business and | ​ | ​ | ​
(in thousands) | ​ | residential | ​ | real estate | ​ | property | ​ | residential | ​ | apartments | ​ | loans | ​ | Administration | ​ | medallion | ​ | other | ​ | Total
Allowance for credit losses: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Beginning balance | ​ | $ | 5,676 | ​ | $ | 4,315 | ​ | $ | 1,867 | ​ | $ | 749 | ​ | $ | — | ​ | $ | 329 | ​ | $ | 418 | ​ | $ | — | ​ | $ | 7,591 | ​ | $ | 20,945
Charge-off's | ​ |  | (190) | ​ |  | — | ​ |  | (89) | ​ |  | (113) | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (2,386) | ​ |  | (2,778)
Recoveries | ​ |  | 44 | ​ |  | 37 | ​ |  | 197 | ​ |  | 13 | ​ |  | — | ​ |  | — | ​ |  | 60 | ​ |  | 134 | ​ |  | 288 | ​ |  | 773
Provision (benefit) | ​ |  | (139) | ​ |  | 77 | ​ |  | (158) | ​ |  | 107 | ​ |  | — | ​ |  | 112 | ​ |  | (115) | ​ |  | (134) | ​ |  | 3,061 | ​ |  | 2,811
Ending balance | ​ | $ | 5,391 | ​ | $ | 4,429 | ​ | $ | 1,817 | ​ | $ | 756 | ​ | $ | — | ​ | $ | 441 | ​ | $ | 363 | ​ | $ | — | ​ | $ | 8,554 | ​ | $ | 21,751
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, 2018
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | One-to-four | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | ​ | ​ |  | family - |  | One-to-four |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | Commercial |  | ​ | ​
​ | ​ | Multi-family | ​ | Commercial | ​ | mixed-use | ​ | family - | ​ | Co-operative | ​ | Construction | ​ | Small Business | ​ | Taxi | ​ | business and | ​ | ​ | ​
(in thousands) | ​ | residential | ​ | real estate | ​ | property | ​ | residential | ​ | apartments | ​ | loans | ​ | Administration | ​ | medallion | ​ | other | ​ | Total
Allowance for credit losses: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Beginning balance | ​ | $ | 5,823 | ​ | $ | 4,643 | ​ | $ | 2,545 | ​ | $ | 1,082 | ​ | $ | — | ​ | $ | 68 | ​ | $ | 669 | ​ | $ | — | ​ | $ | 5,521 | ​ | $ | 20,351
Charge-off's | ​ |  | (99) | ​ |  | — | ​ |  | (3) | ​ |  | (1) | ​ |  | — | ​ |  | — | ​ |  | (392) | ​ |  | (393) | ​ |  | (44) | ​ |  | (932)
Recoveries | ​ |  | 6 | ​ |  | — | ​ |  | 136 | ​ |  | 569 | ​ |  | — | ​ |  | — | ​ |  | 51 | ​ |  | 143 | ​ |  | 46 | ​ |  | 951
Provision (benefit) | ​ |  | (54) | ​ |  | (328) | ​ |  | (811) | ​ |  | (901) | ​ |  | — | ​ |  | 261 | ​ |  | 90 | ​ |  | 250 | ​ |  | 2,068 | ​ |  | 575
Ending balance | ​ | $ | 5,676 | ​ | $ | 4,315 | ​ | $ | 1,867 | ​ | $ | 749 | ​ | $ | — | ​ | $ | 329 | ​ | $ | 418 | ​ | $ | — | ​ | $ | 7,591 | ​ | $ | 20,945
Financing Receivable Credit Quality Indicators [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Revolving Loans, | ​ | ​ | Lines of Credit | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Amortized Cost | ​ | ​ | converted to | ​ | ​ | ​
(In thousands) | ​ | ​ | 2020 | ​ | ​ | 2019 | ​ | ​ | 2018 | ​ | ​ | 2017 | ​ | ​ | 2016 | ​ | ​ | Prior | ​ | ​ | Basis | ​ | ​ | term loans | ​ | ​ | Total
1-4 Family Residential | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 32,266 | ​ | $ | 37,149 | ​ | $ | 38,063 | ​ | $ | 21,293 | ​ | $ | 13,229 | ​ | $ | 65,916 | ​ | $ | 10,793 | ​ | $ | 15,974 | ​ | $ | 234,683
Watch | ​ | ​ | 486 | ​ | ​ | 720 | ​ | ​ | — | ​ | ​ | 3,302 | ​ | ​ | 446 | ​ | ​ | 2,599 | ​ | ​ | 635 | ​ | ​ | 2,397 | ​ | ​ | 10,585
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,338 | ​ | ​ | — | ​ | ​ | 383 | ​ | ​ | 1,721
Substandard | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 960 | ​ | ​ | 3,183 | ​ | ​ | — | ​ | ​ | 1,559 | ​ | ​ | 5,702
Total 1-4 Family Residential | ​ | $ | 32,752 | ​ | $ | 37,869 | ​ | $ | 38,063 | ​ | $ | 24,595 | ​ | $ | 14,635 | ​ | $ | 73,036 | ​ | $ | 11,428 | ​ | $ | 20,313 | ​ | $ | 252,691
1-4 Family Mixed-Use | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 36,491 | ​ | $ | 72,920 | ​ | $ | 77,037 | ​ | $ | 58,404 | ​ | $ | 53,518 | ​ | $ | 282,169 | ​ | $ | — | ​ | $ | — | ​ | $ | 580,539
Watch | ​ | ​ | 816 | ​ | ​ | — | ​ | ​ | 4,077 | ​ | ​ | 6,107 | ​ | ​ | 882 | ​ | ​ | 9,617 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 21,499
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 368 | ​ | ​ | 722 | ​ | ​ | 1,433 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,523
Substandard | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 809 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,515 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,324
Total 1-4 Family Mixed Use | ​ | $ | 37,307 | ​ | $ | 72,920 | ​ | $ | 81,923 | ​ | $ | 64,879 | ​ | $ | 55,122 | ​ | $ | 294,734 | ​ | $ | — | ​ | $ | — | ​ | $ | 606,885
Commercial Real Estate | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 173,089 | ​ | $ | 263,007 | ​ | $ | 266,949 | ​ | $ | 191,532 | ​ | $ | 220,560 | ​ | $ | 499,186 | ​ | $ | — | ​ | $ | — | ​ | $ | 1,614,323
Watch | ​ | ​ | 938 | ​ | ​ | 1,359 | ​ | ​ | 15,557 | ​ | ​ | 15,687 | ​ | ​ | 29,445 | ​ | ​ | 62,587 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 125,573
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,547 | ​ | ​ | 2,576 | ​ | ​ | 1,350 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 6,473
Substandard | ​ | ​ | — | ​ | ​ | 9,436 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,579 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 12,015
Total Commercial Real Estate | ​ | $ | 174,027 | ​ | $ | 273,802 | ​ | $ | 282,506 | ​ | $ | 209,766 | ​ | $ | 252,581 | ​ | $ | 565,702 | ​ | $ | — | ​ | $ | — | ​ | $ | 1,758,384
Construction | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 16,768 | ​ | $ | 16,793 | ​ | $ | 28,984 | ​ | $ | 5,253 | ​ | $ | — | ​ | $ | 590 | ​ | $ | — | ​ | $ | — | ​ | $ | 68,388
Watch | ​ | ​ | — | ​ | ​ | 1,115 | ​ | ​ | 9,572 | ​ | ​ | 750 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 11,437
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 761 | ​ | ​ | 2,575 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 3,336
Total Construction | ​ | $ | 16,768 | ​ | $ | 17,908 | ​ | $ | 39,317 | ​ | $ | 8,578 | ​ | $ | — | ​ | $ | 590 | ​ | $ | — | ​ | $ | — | ​ | $ | 83,161
Multifamily | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 245,551 | ​ | $ | 343,887 | ​ | $ | 479,644 | ​ | $ | 376,275 | ​ | $ | 282,185 | ​ | $ | 769,712 | ​ | $ | 4,572 | ​ | $ | — | ​ | $ | 2,501,826
Watch | ​ | ​ | 1,126 | ​ | ​ | 4,906 | ​ | ​ | 982 | ​ | ​ | 931 | ​ | ​ | 3,457 | ​ | ​ | 14,806 | ​ | ​ | 798 | ​ | ​ | — | ​ | ​ | 27,006
Special Mention | ​ | ​ | — | ​ | ​ | 699 | ​ | ​ | — | ​ | ​ | 2,536 | ​ | ​ | 464 | ​ | ​ | 668 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,367
Substandard | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,997 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 580 | ​ | ​ | 201 | ​ | ​ | — | ​ | ​ | 2,778
Total Multifamily | ​ | $ | 246,677 | ​ | $ | 349,492 | ​ | $ | 482,623 | ​ | $ | 379,742 | ​ | $ | 286,106 | ​ | $ | 785,766 | ​ | $ | 5,571 | ​ | $ | — | ​ | $ | 2,535,977
Commercial Business - Secured by RE | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 110,649 | ​ | $ | 43,909 | ​ | $ | 54,016 | ​ | $ | 36,010 | ​ | $ | 50,230 | ​ | $ | 86,662 | ​ | $ | — | ​ | $ | — | ​ | $ | 381,476
Watch | ​ | ​ | 24,539 | ​ | ​ | 51,466 | ​ | ​ | 17,390 | ​ | ​ | 1,320 | ​ | ​ | 962 | ​ | ​ | 16,192 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 111,869
Special Mention | ​ | ​ | — | ​ | ​ | 613 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 613
Substandard | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,220 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,220
Total Commercial Business - Secured by RE | ​ | $ | 135,188 | ​ | $ | 95,988 | ​ | $ | 71,406 | ​ | $ | 37,330 | ​ | $ | 51,192 | ​ | $ | 107,074 | ​ | $ | — | ​ | $ | — | ​ | $ | 498,178
Commercial Business | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 97,071 | ​ | $ | 118,501 | ​ | $ | 104,304 | ​ | $ | 51,627 | ​ | $ | 17,340 | ​ | $ | 66,398 | ​ | $ | 250,633 | ​ | $ | — | ​ | $ | 705,874
Watch | ​ | ​ | 250 | ​ | ​ | 22,490 | ​ | ​ | 19,202 | ​ | ​ | 20,591 | ​ | ​ | 39 | ​ | ​ | 26 | ​ | ​ | 11,564 | ​ | ​ | — | ​ | ​ | 74,162
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,411 | ​ | ​ | 93 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 246 | ​ | ​ | — | ​ | ​ | 2,750
Substandard | ​ | ​ | 4,897 | ​ | ​ | 594 | ​ | ​ | 17 | ​ | ​ | 6,441 | ​ | ​ | 2,285 | ​ | ​ | 1,647 | ​ | ​ | 1,161 | ​ | ​ | — | ​ | ​ | 17,042
Doubtful | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,273 | ​ | ​ | — | ​ | ​ | 1,273
Total Commercial Business | ​ | $ | 102,218 | ​ | $ | 141,585 | ​ | $ | 125,934 | ​ | $ | 78,752 | ​ | $ | 19,664 | ​ | $ | 68,071 | ​ | $ | 264,877 | ​ | $ | — | ​ | $ | 801,101
Small Business Administration | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 151,449 | ​ | $ | 1,453 | ​ | $ | 4,194 | ​ | $ | 1,327 | ​ | $ | 1,882 | ​ | $ | 1,523 | ​ | $ | — | ​ | $ | — | ​ | $ | 161,828
Watch | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,948 | ​ | ​ | 570 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,518
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 50 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 50
Substandard | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,168 | ​ | ​ | 6 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,174
Total Small Business Administration | ​ | $ | 151,449 | ​ | $ | 1,453 | ​ | $ | 4,194 | ​ | $ | 4,443 | ​ | $ | 2,458 | ​ | $ | 1,573 | ​ | $ | — | ​ | $ | — | ​ | $ | 165,570
Taxi Medallions | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Substandard | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 279 | ​ | $ | — | ​ | $ | 2,318 | ​ | $ | — | ​ | $ | — | ​ | $ | 2,597
Total Taxi Medallions | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 279 | ​ | $ | — | ​ | $ | 2,318 | ​ | $ | — | ​ | $ | — | ​ | $ | 2,597
Other | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 37 | ​ | $ | 93 | ​ | $ | — | ​ | $ | 130
Total Other | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 37 | ​ | $ | 93 | ​ | $ | — | ​ | $ | 130
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total Loans | ​ | $ | 896,386 | ​ | $ | 991,017 | ​ | $ | 1,125,966 | ​ | $ | 808,364 | ​ | $ | 681,758 | ​ | $ | 1,898,901 | ​ | $ | 281,969 | ​ | $ | 20,313 | ​ | $ | 6,704,674
​ ​ The following table sets forth the recorded investment in loans designated as Criticized or Classified at December 31, 2019: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(In thousands) |  | Special Mention |  | Substandard |  | Doubtful |  | Loss |  | Total
Multi-family residential | ​ | $ | 1,563 | ​ | $ | 2,743 | ​ | $ | — | ​ | $ | — | ​ | $ | 4,306
Commercial real estate | ​ |  | 5,525 | ​ |  | 367 | ​ |  | — | ​ |  | — | ​ |  | 5,892
One-to-four family - mixed-use property | ​ |  | 1,585 | ​ |  | 453 | ​ |  | — | ​ |  | — | ​ |  | 2,038
One-to-four family - residential | ​ |  | 1,095 | ​ |  | 5,787 | ​ |  | — | ​ |  | — | ​ |  | 6,882
Small Business Administration (1) | ​ |  | 55 | ​ |  | 85 | ​ |  | — | ​ |  | — | ​ |  | 140
Taxi medallion | ​ |  | — | ​ |  | 3,309 | ​ |  | — | ​ |  | — | ​ |  | 3,309
Commercial business and other | ​ |  | 3,924 | ​ |  | 11,289 | ​ |  | 266 | ​ |  | — | ​ |  | 15,479
Total loans | ​ | $ | 13,747 | ​ | $ | 24,033 | ​ | $ | 266 | ​ | $ | — | ​ | $ | 38,046
(1) | Balance reported net of SBA Guaranteed portion.
Summary of types of collateral-dependent loans by class of loans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​
​ | ​ | Collateral Type
(In thousands) | ​ | ​ | Real Estate | ​ | ​ | Business Assets
Multi-family residential | ​ | $ | 2,576 | ​ | $ | —
Commercial real estate | ​ | ​ | 2,994 | ​ | ​ | —
One-to-four family - mixed-use property | ​ | ​ | 1,706 | ​ | ​ | —
One-to-four family - residential | ​ | ​ | 5,313 | ​ | ​ | —
Small Business Administration | ​ | ​ | — | ​ | ​ | 1,168
Commercial business and other | ​ | ​ | — | ​ | ​ | 3,482
Taxi Medallion | ​ | ​ | — | ​ | ​ | 2,758
Total | ​ | $ | 12,589 | ​ | $ | 7,408
Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price [Table Text Block] | ​
​ | ​ | ​ | ​
(Dollars in thousands) | ​ | Amount
Purchase price (1) | ​ | $ | 297,807
Allowance for Credit Losses at Acquisition Date | ​ | ​ | (4,099)
Noncredit Discount | ​ |  | (7,616)
Total consideration paid | ​ | $ | 286,092
(1) | Purchase price includes $1.7 million of charge-offs by ENB prior to acquisition.
Nonperforming Financial Instruments [Member] |
Notes Tables |
Troubled Debt Restructurings on Financing Receivables [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ | ​ | Number | ​ | Amortized
(Dollars in thousands) |  | of contracts |  | Cost
Taxi medallion |  | 11 | ​ | $ | 1,922
Commercial business and other |  | 1 | ​ |  | 279
Total troubled debt restructurings that subsequently defaulted |  | 12 | ​ | $ | 2,201
​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019
​ | ​ | Number | ​ | Recorded
(Dollars in thousands) |  | of contracts |  | investment
Taxi medallion |  | 4 | ​ | $ | 1,065
Commercial business and other |  | 1 | ​ |  | 279
Total TDR's that subsequently defaulted |  | 5 | ​ | $ | 1,344
Schedule of Financing Receivables, Non Accrual Status [Table Text Block] | ​
​ | ​ | ​ | ​
​ | ​ | At December 31,
(In thousands) |  | 2019
Loans ninety days or more past due and still accruing: |  | ​ |
Multi-family residential | ​ | $ | 445
Total | ​ |  | 445
Non-accrual mortgage loans: | ​ |  |
Multi-family residential | ​ |  | 2,296
Commercial real estate | ​ |  | 367
One-to-four family mixed-use property | ​ |  | 274
One-to-four family residential | ​ |  | 5,139
Total | ​ |  | 8,076
Non-accrual non-mortgage loans: | ​ |  |
Small Business Administration | ​ |  | 1,151
Taxi medallion (1) | ​ |  | 1,641
Commercial business and other (1) | ​ |  | 1,945
Total | ​ |  | 4,737
Total non-accrual loans | ​ |  | 12,813
Total non-performing loans | ​ | $ | 13,258
Performing According to Restructured Terms [Member] |
Notes Tables |
Troubled Debt Restructurings on Financing Receivables [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ | ​ | Number | ​ | Amortized
(Dollars in thousands) |  | of contracts |  | Cost
Multi-family residential |  | 6 | ​ | $ | 1,700
Commercial real estate | ​ | 1 | ​ | ​ | 7,702
One-to-four family - mixed-use property |  | 5 | ​ |  | 1,731
One-to-four family - residential |  | 3 | ​ |  | 507
Taxi medallion |  | 2 | ​ |  | 440
Commercial business and other |  | 8 | ​ |  | 3,831
Total performing |  | 25 | ​ | $ | 15,911
​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019
​ | ​ | Number | ​ | Recorded
(Dollars in thousands) |  | of contracts |  | investment
Multi-family residential |  | 7 | ​ | $ | 1,873
One-to-four family - mixed-use property |  | 4 | ​ |  | 1,481
One-to-four family - residential |  | 3 | ​ |  | 531
Taxi medallion |  | 7 | ​ |  | 1,668
Commercial business and other |  | 3 | ​ |  | 941
Total performing |  | 24 | ​ | $ | 6,494

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