BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Loans (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unamortized retained loan discounts	$ 9,800,000		$ 9,800,000		$ 9,600,000
Loan receivable, nonaccrual, past due period (more than)			60 days
Loans receivable, impairment and (recovery) recorded	0	$ (88,000)	$ 0	$ 4,000
Loan loss reserves	954,000		954,000		943,000
PMC Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquisition discount	$ 321,000		$ 321,000		$ 381,000	$ 33,900,000