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FAIR VALUES OF FINANCIAL INSTRUMENTS - Gains and (Losses) on Non-Recurring Assets (Details) - Nonrecurring - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Individually evaluated loans: | Single family residential mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains and (losses) recognized on assets measured at fair value	$ (532)	$ (169)	$ (490)
Individually evaluated loans: | Commercial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains and (losses) recognized on assets measured at fair value	(1,491)	(10,292)	0
Individually evaluated loans: | Commercial real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains and (losses) recognized on assets measured at fair value	(555)	0	0
Individually evaluated loans: | SBA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains and (losses) recognized on assets measured at fair value	(1,888)	(2,052)	(46)
Individually evaluated loans: | Other consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains and (losses) recognized on assets measured at fair value	0	0	(88)
Single family residential mortgage | Other real estate owned:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains and (losses) recognized on assets measured at fair value	$ 0	$ 0	$ (104)

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