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Loans (Tables) | 3 Months Ended
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Mar. 31, 2020
Notes Tables |
Schedule of Financing Receivables, Non Accrual Status [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | At or three months ended March 31, 2020
​ | ​ | ​ | ​ | ​ | ​ | Non-Accrual | ​ | ​ | ​ | ​ | ​ | Loans ninety days
​ | ​ | ​ | Total Non-Accrual | ​ | ​ | with no related | ​ | ​ | Interest Income | ​ | ​ | or more past due
(In thousands) | ​ | ​ | Amortized Cost | ​ | ​ | Allowance | ​ | ​ | Recognized | ​ | ​ | and still accruing:
Multi-family residential | ​ | $ | 2,763 | ​ | $ | 2,763 | ​ | $ | — | ​ | $ | —
Commercial real estate | ​ | ​ | 8 | ​ | ​ | 8 | ​ | ​ | — | ​ | ​ | —
One-to-four family - mixed-use property | ​ | ​ | 627 | ​ | ​ | 346 | ​ | ​ | — | ​ | ​ | —
One-to-four family - residential | ​ | ​ | 4,588 | ​ | ​ | 4,588 | ​ | ​ | — | ​ | ​ | —
Construction loans | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Small Business Administration | ​ | ​ | 1,544 | ​ | ​ | 1,544 | ​ | ​ | — | ​ | ​ | —
Taxi Medallion (1) | ​ | ​ | 1,763 | ​ | ​ | 1,763 | ​ | ​ | 9 | ​ | ​ | —
Commercial business and other (1) | ​ | ​ | 5,006 | ​ | ​ | 5,001 | ​ | ​ | — | ​ | ​ | —
Total | ​ | $ | 16,299 | ​ | $ | 16,013 | ​ | $ | 9 | ​ | $ | —
Schedule Of Interest Foregone On Non Accrual And TDR Loans [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the three months ended
​ | ​ | March 31,
​ |  | 2020 |  | 2019
​ | ​ | ​ | ​ | ​ | ​ | ​
Interest income that would have been recognized had the loans performed in accordance with their original terms | ​ | $ | 375 | ​ | $ | 394
Less: Interest income included in the results of operations | ​ |  | 89 | ​ |  | 118
Total foregone interest | ​ | $ | 286 | ​ | $ | 276
Past Due Financing Receivables [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2020
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 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 | ​ | $ | 1,919 | ​ | $ | — | ​ | $ | 2,763 | ​ | $ | 4,682 | ​ | $ | 2,274,090 | ​ | $ | 2,278,772
Commercial real estate | ​ |  | 5,206 | ​ |  | — | ​ |  | 8 | ​ |  | 5,214 | ​ |  | 1,661,599 | ​ |  | 1,666,813
One-to-four family - mixed-use property | ​ |  | 3,283 | ​ |  | — | ​ |  | 627 | ​ |  | 3,910 | ​ |  | 592,435 | ​ |  | 596,345
One-to-four family - residential | ​ |  | 1,322 | ​ |  | 381 | ​ |  | 4,588 | ​ |  | 6,291 | ​ |  | 193,593 | ​ |  | 199,884
Construction loans | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 66,524 | ​ |  | 66,524
Small Business Administration | ​ |  | — | ​ |  | — | ​ |  | 1,544 | ​ |  | 1,544 | ​ |  | 12,961 | ​ |  | 14,505
Taxi medallion | ​ |  | — | ​ |  | — | ​ |  | 1,195 | ​ |  | 1,195 | ​ |  | 2,087 | ​ |  | 3,282
Commercial business and other | ​ |  | 645 | ​ |  | 153 | ​ |  | 4,968 | ​ |  | 5,766 | ​ |  | 1,100,197 | ​ |  | 1,105,963
Total | ​ | $ | 12,375 | ​ | $ | 534 | ​ | $ | 15,693 | ​ | $ | 28,602 | ​ | $ | 5,903,486 | ​ | $ | 5,932,088
​ ​ The following tables show by delinquency an analysis of our recorded investment in loans at the periods indicated by class of loans: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 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] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2020
​ |  | ​ | ​ |  | ​ | ​ |  | One-to-four |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | family - | ​ | One-to-four | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Commercial | ​ | ​ | ​
​ | ​ | Multi-family | ​ | Commercial | ​ | mixed-use | ​ | family - | ​ | Construction | ​ | Small Business | ​ | Taxi | ​ | business and | ​ | ​ | ​
(In thousands) | ​ | residential | ​ | real estate | ​ | property | ​ | residential | ​ | 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 | ​ | ​ | (651) | ​ | ​ | 1,170 | ​ | ​ | (55) | ​ | ​ | (159) | ​ | ​ | (279) | ​ | ​ | 1,180 | ​ | ​ | — | ​ | ​ | (827) | ​ | ​ | 379
Charge-offs | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (1,259) | ​ |  | (1,259)
Recoveries | ​ |  | 7 | ​ |  | — | ​ |  | 78 | ​ |  | 4 | ​ |  | — | ​ |  | 7 | ​ |  | — | ​ |  | 14 | ​ |  | 110
Provision (benefit) | ​ |  | 1,148 | ​ |  | 1,192 | ​ |  | 330 | ​ |  | 291 | ​ |  | 23 | ​ |  | (22) | ​ |  | — | ​ |  | 4,155 | ​ |  | 7,117
Ending balance | ​ | $ | 5,895 | ​ | $ | 6,791 | ​ | $ | 2,170 | ​ | $ | 892 | ​ | $ | 185 | ​ | $ | 1,528 | ​ | $ | — | ​ | $ | 10,637 | ​ | $ | 28,098
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2019
​ |  | ​ | ​ |  | ​ | ​ |  | One-to-four |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | family - | ​ | One-to-four | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Commercial | ​ | ​ | ​
​ | ​ | Multi-family | ​ | Commercial | ​ | mixed-use | ​ | family - | ​ | Construction | ​ | Small Business | ​ | Taxi | ​ | business and | ​ | ​ | ​
(In thousands) | ​ | residential | ​ | real estate | ​ | property | ​ | residential | ​ | 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-offs | ​ |  | — | ​ |  | — | ​ |  | (1) | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (1,137) | ​ |  | (1,138)
Recoveries | ​ |  | 13 | ​ |  | — | ​ |  | 86 | ​ |  | 4 | ​ |  | — | ​ |  | 4 | ​ |  | 84 | ​ |  | 45 | ​ |  | 236
Provision (benefit) | ​ |  | (196) | ​ |  | (37) | ​ |  | (161) | ​ |  | (22) | ​ |  | 22 | ​ |  | (13) | ​ |  | (84) | ​ |  | 1,463 | ​ |  | 972
Ending balance | ​ | $ | 5,493 | ​ | $ | 4,278 | ​ | $ | 1,791 | ​ | $ | 731 | ​ | $ | 351 | ​ | $ | 409 | ​ | $ | — | ​ | $ | 7,962 | ​ | $ | 21,015
Financing Receivable Credit Quality Indicators [Table Text Block] | The following table summarizes the risk category of mortgage and non-mortgage loans by loan portfolio segments and class of loans by year of origination :
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Revolving Loans, | ​ | ​ | Lines of Credit
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Amortized Cost | ​ | ​ | converted to
(In thousands) | ​ | ​ | 2020 | ​ | ​ | 2019 | ​ | ​ | 2018 | ​ | ​ | 2017 | ​ | ​ | 2016 | ​ | ​ | Prior | ​ | ​ | Basis | ​ | ​ | term loans
1-4 Family Residential | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 8,526 | ​ | $ | 26,292 | ​ | $ | 29,807 | ​ | $ | 16,352 | ​ | $ | 11,399 | ​ | $ | 65,998 | ​ | $ | 9,361 | ​ | $ | 22,132
Watch | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,759 | ​ | ​ | — | ​ | ​ | 1,809
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 444 | ​ | ​ | 146 | ​ | ​ | 147
Substandard | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 950 | ​ | ​ | 2,906 | ​ | ​ | — | ​ | ​ | 856
Total 1-4 Family Residential | ​ | $ | 8,526 | ​ | $ | 26,292 | ​ | $ | 29,807 | ​ | $ | 16,352 | ​ | $ | 12,349 | ​ | $ | 72,107 | ​ | $ | 9,507 | ​ | $ | 24,944
1-4 Family Mixed-Use | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 15,189 | ​ | $ | 70,064 | ​ | $ | 78,136 | ​ | $ | 63,655 | ​ | $ | 54,009 | ​ | $ | 304,415 | ​ | $ | — | ​ | $ | —
Watch | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 793 | ​ | ​ | — | ​ | ​ | 1,325 | ​ | ​ | 7,148 | ​ | ​ | — | ​ | ​ | —
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 984 | ​ | ​ | — | ​ | ​ | —
Substandard | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 627 | ​ | ​ | — | ​ | ​ | —
Total 1-4 Family Mixed Use | ​ | $ | 15,189 | ​ | $ | 70,064 | ​ | $ | 78,929 | ​ | $ | 63,655 | ​ | $ | 55,334 | ​ | $ | 313,174 | ​ | $ | — | ​ | $ | —
Commercial Real Estate | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 75,893 | ​ | $ | 254,086 | ​ | $ | 283,515 | ​ | $ | 194,618 | ​ | $ | 239,116 | ​ | $ | 511,871 | ​ | $ | — | ​ | $ | —
Watch | ​ | ​ | 4,979 | ​ | ​ | 9,762 | ​ | ​ | — | ​ | ​ | 4,963 | ​ | ​ | 20,748 | ​ | ​ | 66,711 | ​ | ​ | — | ​ | ​ | —
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 543 | ​ | ​ | — | ​ | ​ | —
Substandard | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 8 | ​ | ​ | — | ​ | ​ | —
Total Commercial Real Estate | ​ | $ | 80,872 | ​ | $ | 263,848 | ​ | $ | 283,515 | ​ | $ | 199,581 | ​ | $ | 259,864 | ​ | $ | 579,133 | ​ | $ | — | ​ | $ | —
Construction | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 4,885 | ​ | $ | 15,633 | ​ | $ | 35,934 | ​ | $ | — | ​ | $ | 9,394 | ​ | $ | — | ​ | $ | — | ​ | $ | —
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 678 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Total Construction | ​ | $ | 4,885 | ​ | $ | 15,633 | ​ | $ | 36,612 | ​ | $ | — | ​ | $ | 9,394 | ​ | $ | — | ​ | $ | — | ​ | $ | —
Multifamily | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 68,498 | ​ | $ | 313,608 | ​ | $ | 369,264 | ​ | $ | 376,202 | ​ | $ | 283,128 | ​ | $ | 846,228 | ​ | $ | 4,460 | ​ | $ | —
Watch | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,158 | ​ | ​ | 2,843 | ​ | ​ | 9,620 | ​ | ​ | — | ​ | ​ | —
Substandard | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,974 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 789 | ​ | ​ | — | ​ | ​ | —
Total Multifamily | ​ | $ | 68,498 | ​ | $ | 313,608 | ​ | $ | 371,238 | ​ | $ | 378,360 | ​ | $ | 285,971 | ​ | $ | 856,637 | ​ | $ | 4,460 | ​ | $ | —
Commercial Business - Secured by RE | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 27,601 | ​ | $ | 117,070 | ​ | $ | 59,408 | ​ | $ | 22,399 | ​ | $ | 44,964 | ​ | $ | 85,736 | ​ | $ | — | ​ | $ | —
Watch | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 6,647 | ​ | ​ | 1,320 | ​ | ​ | 2,701 | ​ | ​ | 3,276 | ​ | ​ | — | ​ | ​ | —
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 423 | ​ | ​ | — | ​ | ​ | —
Substandard | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,330 | ​ | ​ | — | ​ | ​ | —
Total Commercial Business - Secured by RE | ​ | $ | 27,601 | ​ | $ | 117,070 | ​ | $ | 66,055 | ​ | $ | 23,719 | ​ | $ | 47,665 | ​ | $ | 91,765 | ​ | $ | — | ​ | $ | —
Commercial Business | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | 39,770 | ​ | $ | 151,169 | ​ | $ | 117,548 | ​ | $ | 73,802 | ​ | $ | 18,931 | ​ | $ | 73,775 | ​ | $ | 213,463 | ​ | $ | —
Watch | ​ | ​ | 1,221 | ​ | ​ | 1,001 | ​ | ​ | 2,372 | ​ | ​ | 3,114 | ​ | ​ | 445 | ​ | ​ | 587 | ​ | ​ | 19,162 | ​ | ​ | —
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 15 | ​ | ​ | ​ | ​ | ​ | 2,683 | ​ | ​ | 463 | ​ | ​ | 317 | ​ | ​ | —
Substandard | ​ | ​ | — | ​ | ​ | 577 | ​ | ​ | 340 | ​ | ​ | 3,386 | ​ | ​ | 6,255 | ​ | ​ | 1,211 | ​ | ​ | 94 | ​ | ​ | —
Doubtful | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 108 | ​ | ​ | — | ​ | ​ | —
Total Commercial Business | ​ | $ | 40,991 | ​ | $ | 152,747 | ​ | $ | 120,275 | ​ | $ | 80,302 | ​ | $ | 28,314 | ​ | $ | 76,144 | ​ | $ | 233,036 | ​ | $ | —
Small Business Administration | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | — | ​ | $ | 986 | ​ | $ | 3,626 | ​ | $ | 1,072 | ​ | $ | 2,704 | ​ | $ | 2,220 | ​ | $ | — | ​ | $ | —
Watch | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,299 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Special Mention | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 54 | ​ | ​ | — | ​ | ​ | —
Substandard | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,170 | ​ | ​ | 374 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Total Small Business Administration | ​ | $ | — | ​ | $ | 986 | ​ | $ | 3,626 | ​ | $ | 4,541 | ​ | $ | 3,078 | ​ | $ | 2,274 | ​ | $ | — | ​ | $ | —
Taxi Medallions | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Substandard | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 3,282 | ​ | ​ | — | ​ | ​ | —
Total Taxi Medallions | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 3,282 | ​ | $ | — | ​ | $ | —
Other | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Pass | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 105 | ​ | $ | 171 | ​ | $ | —
Watch | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 3 | ​ | ​ | —
Total Other | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 105 | ​ | $ | 174 | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total Loans | ​ | $ | 246,562 | ​ | $ | 960,248 | ​ | $ | 990,057 | ​ | $ | 766,510 | ​ | $ | 701,969 | ​ | $ | 1,994,621 | ​ | $ | 247,177 | ​ | $ | 24,944
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ The following table sets forth the recorded investment in loans designated as Criticized or Classified at the period indicated: ​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 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
Construction | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | —
Small Business Administration | ​ |  | 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
​
Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​
​ | ​ | Collateral Type
(In thousands) | ​ | ​ | Real Estate | ​ | ​ | Business Assets
Multi-family residential | ​ | $ | 2,763 | ​ | $ | —
Commercial real estate | ​ | ​ | 8 | ​ | ​ | —
One-to-four family - mixed-use property | ​ | ​ | 627 | ​ | ​ | —
One-to-four family - residential | ​ | ​ | 4,588 | ​ | ​ | —
Small Business Administration | ​ | ​ | — | ​ | ​ | 1,544
Commercial business and other | ​ | ​ | — | ​ | ​ | 5,000
Taxi Medallion | ​ | ​ | — | ​ | ​ | 3,282
Total | ​ | $ | 7,986 | ​ | $ | 9,826
Nonperforming Financial Instruments [Member] |
Notes Tables |
Troubled Debt Restructurings on Financing Receivables [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2020 | ​ | December 31, 2019
​ | ​ | Number | ​ | Recorded | ​ | Number | ​ | Recorded
(Dollars in thousands) |  | of contracts |  | investment |  | of contracts |  | investment
Taxi medallion |  | 5 | ​ | $ | 1,195 |  | 4 | ​ | $ | 1,065
Commercial business and other |  | 1 | ​ |  | 279 |  | 1 | ​ |  | 279
Total troubled debt restructurings that subsequently defaulted |  | 6 | ​ | $ | 1,474 |  | 5 | ​ | $ | 1,344
Schedule of Financing Receivables, Non Accrual Status [Table Text Block] | ​
​ | ​ | ​ | ​
​ | ​ | 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
(1) | Not included in the above analysis are non-accrual performing TDR taxi medallion loans totaling $1.7 million at December 31, 2019, respectively and non-accrual performing TDR commercial business loans totaling $0.9 million at December 31, 2019.
Performing According to Restructured Terms [Member] |
Notes Tables |
Troubled Debt Restructurings on Financing Receivables [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2020 | ​ | December 31, 2019
​ | ​ | Number | ​ | Recorded | ​ | Number | ​ | Recorded
(Dollars in thousands) |  | of contracts |  | investment |  | of contracts |  | investment
Multi-family residential |  | 7 | ​ | $ | 1,868 |  | 7 | ​ | $ | 1,873
One-to-four family - mixed-use property |  | 4 | ​ |  | 1,483 |  | 4 | ​ |  | 1,481
One-to-four family - residential |  | 3 | ​ |  | 525 |  | 3 | ​ |  | 531
Taxi medallion (1) |  | 6 | ​ |  | 1,520 |  | 7 | ​ |  | 1,668
Commercial business and other |  | 3 | ​ |  | 950 |  | 3 | ​ |  | 941
Total performing troubled debt restructured |  | 23 | ​ | $ | 6,346 |  | 24 | ​ | $ | 6,494
| (1) | Taxi medallion loans in the table above continue to pay as agreed, however the company records interest received on a cash basis.

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