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FAIR VALUE OF FINANCIAL INSTRUMENTS - Individually evaluated loans (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract] |  |  |  |
Individually evaluated loans | $ 1,200 |  |  |
Individually evaluated loans outstanding balance, net of a valuation allowance | 10,483,324 | $ 9,160,808 |  |
Allowance for credit losses | 83,507 | 83,853 | $ 41,461 | $ 28,441
Credit loss (release) provision | 6,910 | 3,303 | $ 26,165 |
Nonrecurring |  |  |  |
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract] |  |  |  |
Individually evaluated loans outstanding balance, net of a valuation allowance | 2,500 | 2,500 |  |
Allowance for credit losses | 1,300 | 600 |  |
Credit loss (release) provision | 700 |  |  |
Nonrecurring | Level 3 Inputs |  |  |  |
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract] |  |  |  |
Individually evaluated loans | 1,179 | 1,900 |  |
Carrying Amount |  |  |  |
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract] |  |  |  |
Individually evaluated loans | 10,482,145 | 9,158,908 |  |
Carrying Amount | Nonrecurring |  |  |  |
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis [Abstract] |  |  |  |
Individually evaluated loans | $ 1,179 | $ 1,900 |  |

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