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v3.20.4

LOANS - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2020 USD ($) Contract | Dec. 31, 2019 USD ($) Loan Contract | Dec. 31, 2018 USD ($) Contract
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Loans held for sale, at lower of cost or fair value | $ 18,520,000 | $ 14,667,000 |
Gain (loss) on loans held for sale at lower of cost or fair value | 7,426,000 | (10,000) | $ (4,392,000)
Impaired non-accrual loans | 11,410,000 | 28,881,000 |
Transfer of loans to loans held for sale | 367,477,000 | 15,064,000 | $ 137,317,000
Charge-off | 5,900,000 |  |
Impaired non-accrual loans performing troubled debt restructured | 201,000 | 2,400,000 |
Allowance allocated to troubled debt restructured loans | 3,000 | 2,800,000 |
Allowance allocated to non accrual loans | 0 | $ 2,700,000 |
Loan receivable, validate risk ratings performed for large sample or new lending to existing relationships | 1,000,000 |  |
Loan receivable, validate risk ratings performed for criticized and classified rated borrowers with relationship exposure, value | 500,000 |  |
Loan receivable, validate risk ratings performed for new regulation "O" loan commitments, value | 1,000,000 |  |
Loan receivable validate risk ratings performed for leveraged loans, value | 1,000,000 |  |
Loan receivable validate risk ratings performed for no borrower with commitments, value | $ 500,000 |  |
Bank modified loans and contracts | Contract | 4 | 7 | 3
Post-modification outstanding recorded investment | $ 462,000 | $ 6,558,000 | $ 16,111,000
Loan modifications | 946,300,000 |  |
Troubled debt restructurings specific reserves to customers | $ 3,000 | 2,800,000 |
Deferral [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Bank modified loans and contracts | Contract | 536 |  |
Bank modified loans and contracts | Contract | 54 |  |
Post-modification outstanding recorded investment | $ 73,972,000 |  |
Deferral [Member] | Loan Level Swaps [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Bank modified loans and contracts | Contract | 2 |  |
Post-modification outstanding recorded investment | $ 29,300,000 |  |
Substandard [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Financing receivable impaired loan | 16,200,000 | 35,900,000 |
Minimum [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Loan receivable, validate risk ratings performed for large sample of borrowers with relationship, value | $ 1,000,000 |  |
Minimum [Member] | Deferral [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Deferral of principal and interest periods | 90 days |  |
Maximum [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Loan receivable, validate risk ratings performed for small sample of borrowers with relationship, value | $ 1,000,000 |  |
Maximum [Member] | Deferral [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Deferral of principal and interest periods | 180 days |  |
Residential and Commercial Loans [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Transfer of loans to loans held for sale | $ 18,500,000 |  |
Multifamily Property [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Loans held for sale, at lower of cost or fair value |  |  | $ 131,300,000
Commercial and Industrial Sector [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Loans held for sale, at lower of cost or fair value |  | $ 5,000,000.0 |
Number of loan sold | Loan |  | 1 |
Paycheck Protection Program [Member] |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |
Loans held for sale, at lower of cost or fair value | 355,000,000.0 |  |
Gain (loss) on loans held for sale at lower of cost or fair value | $ 7,400,000 |  |

X
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