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FAIR VALUE - Narrative (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
security
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
security
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
security
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Fair value option, aggregate fair value exceeded (less than) principal amount $ (565,000)   $ (565,000)   $ 150,000
Increase (decrease) in fair value     56,420,000 $ 104,190,000  
OREO balances 0   0   0
Impairment reserve for mortgage servicing rights 0   0   $ 79,000
Reversal of charges $ (47,000) $ (45,000) (79,000) $ (651,000)  
Interest rate lock commitments on residential mortgages          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Increase (decrease) in fair value     $ 10,000    
Level 3 | Municipal Bonds          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Number of investment securities | security 1   1   1
Level 3 | Non-agency CMOs          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Number of investment securities | security         1
Level 3 | Measurement Input, Pull Through | Interest rate lock commitments on residential mortgages          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Asset, measurement input (percent) 0.92   0.92    
Level 3 | Measurement Input, Pull Through Increase (Decrease) | Interest rate lock commitments on residential mortgages          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Asset, measurement input (percent) 0.05   0.05