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LOANS - Aging of Troubled Debt Restructurings (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Troubled Debt Restructurings |  |
Loans current and past due less than 30 days | $ 1,563,091 | $ 1,627,899
Nonaccrual loans | 21,341 | 21,416
Past Due 30-89 Days |  |
Troubled Debt Restructurings |  |
Loans past due | 3,167 | 8,607
Past Due 90+ Days |  |
Troubled Debt Restructurings |  |
Loans past due | 9,450 | 7,703
Troubled Debt Restructuring |  |
Troubled Debt Restructurings |  |
Loans current and past due less than 30 days | 144 | 166
Nonaccrual loans | 5,457 | 6,867
Troubled debt restructurings | 5,823 | 7,451
Troubled Debt Restructuring | Past Due 30-89 Days |  |
Troubled Debt Restructurings |  |
Loans past due | 88 | 0
Troubled Debt Restructuring | Past Due 90+ Days |  |
Troubled Debt Restructurings |  |
Loans past due | $ 134 | $ 418

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