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FAIR VALUE - Impairment of Valuation Adjustments were Recorded for Assets Recognized at Fair Value (Detail) - Fair Value Measurements Nonrecurring [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Portion At Fair Value Fair Value Disclosure [Member] | Loans Held For Sale [Member]      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings     $ (10,102)
Fair Value Inputs Level 1 [Member]      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Loans receivable $ 0 $ 0 0
Other Real Estate Owned 0 0 0
Mortgage servicing rights     0
Fair Value Inputs Level 1 [Member] | Loans Held For Sale [Member]      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Loans held for sale     0
Fair Value Inputs Level 2 [Member]      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Loans receivable 0 0 0
Other Real Estate Owned 0 0 0
Mortgage servicing rights     0
Fair Value Inputs Level 2 [Member] | Loans Held For Sale [Member]      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Loans held for sale     0
Fair Value Inputs Level 3 [Member]      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Loans receivable 246,803 217,252 365,726
Other Real Estate Owned 83,060 101,626 131,402
Mortgage servicing rights     0
Loans held for sale   0  
Fair Value Inputs Level 3 [Member] | OREO [Member]      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Assets Fair Value Adjustment (1,970) (6,572) (11,499)
Fair Value Inputs Level 3 [Member] | Mortgage Servicing Rights [Member]      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Assets Fair Value Adjustment     0
Fair Value Inputs Level 3 [Member] | Loans Held For Sale [Member]      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Assets Fair Value Adjustment 0    
Loans held for sale     16,111
Fair Value Inputs Level 3 [Member] | Loans Receivable [Member]      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Assets Fair Value Adjustment $ (5,675) $ (18,013) $ (29,799)