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NON-PERFORMING ASSETS INCLUDING TROUBLED DEBT RESTRUCTURINGS - Additional information (Details) |  | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) | Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($) loan
Aggregate of multiple consecutive maturity date extensions delay in payment, days |  | 120 days |
ALL reserve for TDR's |  | $ 132,000 | $ 103,000
Decrease in loan modifications to COVID-19 | $ 200,000,000 |  |
Increase in loan modifications to COVID-19 |  | $ (41,300,000) |
Percentage of increase in balance of loan modifications |  | 84.20% |
Accrued interest receivable due to loan modification |  | $ 541,000,000,000 |
Second payment deferral |  |  |
Number of loans | loan |  | 5 |
Payment relief that have been granted |  | $ 7,500,000 |
Complete payment deferrals |  |  |
Number of loans | loan |  | 5 | 59
Residential Real Estate [Member] |  |  |
Other Assets, Noncurrent |  | $ 0 |
Residential Mortgages [Member] |  |  |
Mortgage Loans in Process of Foreclosure, Amount |  | $ 116,000 |

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