FAIR VALUE - Summary of Assets and Liabilities measured on a Non-Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets measured at fair value on non-recurring basis
Loans held for sale	$ 52,800	$ 12,600
Other real estate owned	0
Carrying Amount
Assets measured at fair value on non-recurring basis
Loans held for sale	52,785	12,643
Fair Value
Assets measured at fair value on non-recurring basis
Loans held for sale	52,785	12,643
Quoted Prices In Active Markets for Identical Assets (Level 1)
Assets measured at fair value on non-recurring basis
Loans held for sale	42,785
Significant Unobservable Inputs (Level 3)
Assets measured at fair value on non-recurring basis
Loans held for sale	10,000	12,643
Non-recurring basis | Carrying Amount
Assets measured at fair value on non-recurring basis
Loans held for sale	52,785	12,643
Individually evaluated loans	2,940
Impaired loans		6,981
Non-recurring basis | Quoted Prices In Active Markets for Identical Assets (Level 1) | Fair Value
Assets measured at fair value on non-recurring basis
Loans held for sale	42,785
Non-recurring basis | Significant Unobservable Inputs (Level 3) | Fair Value
Assets measured at fair value on non-recurring basis
Loans held for sale	10,000	12,643
Individually evaluated loans	$ 2,940
Impaired loans		$ 6,981