FAIR VALUE DISCLOSURES - Summary of Financial Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Impaired Commercial And Commercial Real Estate Loans Member
Assets
Allowance for Loan and Lease Losses, Real Estate	$ 10,400	$ 13,500
Fair Value, Measurements, Nonrecurring | Fair Value Measurements Using Level 1
Assets
OREO	0	0
Fair Value, Measurements, Nonrecurring | Fair Value Measurements Using Level 1 | Fair value | Commercial
Assets
Assets, Fair Value Disclosure	0	0
Fair Value, Measurements, Nonrecurring | Fair Value Measurements Using Level 1 | Fair value | Commercial real estate
Assets
Assets, Fair Value Disclosure	0	0
Fair Value, Measurements, Nonrecurring | Fair Value Measurements Using Level 2
Assets
OREO	0	0
Fair Value, Measurements, Nonrecurring | Fair Value Measurements Using Level 2 | Fair value | Commercial
Assets
Assets, Fair Value Disclosure	0	0
Fair Value, Measurements, Nonrecurring | Fair Value Measurements Using Level 2 | Fair value | Commercial real estate
Assets
Assets, Fair Value Disclosure	0	0
Fair Value, Measurements, Nonrecurring | Fair Value Measurements Using Level 3
Assets
OREO	179	54
Fair Value, Measurements, Nonrecurring | Fair Value Measurements Using Level 3 | Fair value | Commercial
Assets
Assets, Fair Value Disclosure	9,609	25,367
Fair Value, Measurements, Nonrecurring | Fair Value Measurements Using Level 3 | Fair value | Commercial real estate
Assets
Assets, Fair Value Disclosure	$ 7,502	$ 6,432