ALLOWANCE FOR CREDIT LOSSES - Allowance for credit losses for unfunded commitments (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment [Line Items]
Beginning balance	$ 40,637	$ 25,280
Ending balance	31,345	40,637
Unfunded Commitment
Financing Receivable, Recorded Investment [Line Items]
Beginning balance	4,177	378
Impact of CECL adoption		2,981
Provision (recapture)	(911)	818
Ending balance	$ 3,266	$ 4,177

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant