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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Components of Troubled Debt Restructured Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	$ 16,684	$ 8,997
Commitments to lend to clients with outstanding loans classified as TDRs	63	63
Accruing TDRs	12,500	4,700
Non-accrual TDRs	4,100	4,300
PMB Acquisition
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	7,900
Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	5,241	3,884
Commercial | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	4,243	0
Commercial | SBA
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	265	265
Consumer | Single family residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	6,935	4,848
Consumer | Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	$ 0	$ 0

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
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