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LOANS AND ALLOWANCE FOR LOAN LOSSES - Narrative (Detail)
 12 Months Ended
Dec. 31, 2016
USD ($)
Dec. 31, 2015
Dec. 30, 2015
Dec. 31, 2016
USD ($)
note
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
note
Receivables [Abstract]            
Maximum percentage of loan-to-value ratio upon loan origination (no more than)       80.00%    
Maximum percentage of loan-to-value ratios of the value of the real estate taken as collateral (no greater than)       90.00%    
Maximum percentage of credit worthiness of the borrower       43.00%    
Minimum amount of loan on which reviews have been made annually $ 500,000     $ 500,000    
Loan on which reviews may require approval by the Chief Credit Officer 1,000,000     1,000,000    
Loan on which reviews require approval by the Officers' Loan Committee 250,000     $ 250,000    
Period past due when loans are deemed impaired       90 days    
Number of notes split | note       2    
Appraisals, required period interval       18 months    
Minimum amount on which annual updated appraisals for criticized loans are required $ 250,000     $ 250,000    
Percentage of strong loan-to-value (or lower)       70.00%    
Look-back period for historical losses 5 years 4 years 3 years      
Look-back, loss history weight, most recent 12 months     50.00%      
Look-back, loss history weight, 2 years ago     25.00%      
Look-back, loss history weight, 3 years ago     25.00%      
Financing Receivable, Allowance for Credit Losses [Line Items]            
Number of notes sold | note       1   6
Carrying balance $ 5,946,000     $ 5,946,000   $ 5,407,000
Cash proceeds       5,100,000 $ 0 5,743,000
Recovery (charge-off) between carrying balances of notes sold and cash received       $ (846,000)   $ 336,000
Minimum            
Financing Receivable, Allowance for Credit Losses [Line Items]            
Historical loss percentage adjustment to anticipated loss allocation (1.50%) (1.50%)   (1.50%) (1.50%)  
Maximum            
Financing Receivable, Allowance for Credit Losses [Line Items]            
Historical loss percentage adjustment to anticipated loss allocation 1.50% 1.50%   1.50% 1.50%