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ALLOWANCE FOR LOAN LOSSES - Summary of Recorded Investment and Unpaid Principal Balance for Impaired Loans (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Financing Receivable Impaired [Line Items]      
With no related allowance recorded investment $ 3,102   $ 3,094
With no related allowance recorded unpaid principal balance 3,179   3,167
With related allowance recorded investment 1,417   1,283
With related allowance recorded unpaid principal balance 1,442   1,303
Related allowance 459   423
Total loans recorded investment 4,519   4,377
Total loans unpaid principal balance 4,621   4,470
With no related allowance average recorded investment 3,177 $ 3,771  
With no related allowance recorded interest income recognized 25 30  
With related allowance average recorded investment 1,329 574  
With related allowance recorded interest income recognized 1 3  
Total loans average recorded investment 4,506 4,345  
Total loans interest income recognized 26 33  
Mortgage Loans on Real Estate [Member]      
Financing Receivable Impaired [Line Items]      
With no related allowance recorded investment 2,908   2,926
With no related allowance recorded unpaid principal balance 2,969   2,985
Related allowance 0   0
Total loans recorded investment 2,908   2,926
Total loans unpaid principal balance 2,969   2,985
With no related allowance average recorded investment 2,914 3,554  
With no related allowance recorded interest income recognized 24 28  
Total loans average recorded investment 2,914 3,554  
Total loans interest income recognized 24 28  
Mortgage Loans on Real Estate [Member] | Construction and development [Member]      
Financing Receivable Impaired [Line Items]      
With no related allowance recorded investment 640   645
With no related allowance recorded unpaid principal balance 657   661
Related allowance 0   0
Total loans recorded investment 640   645
Total loans unpaid principal balance 657   661
With no related allowance average recorded investment 641 1,226  
With no related allowance recorded interest income recognized 5 10  
Total loans average recorded investment 641 1,226  
Total loans interest income recognized 5 10  
Mortgage Loans on Real Estate [Member] | 1-4 Family residential [Member]      
Financing Receivable Impaired [Line Items]      
With no related allowance recorded investment 1,662   1,673
With no related allowance recorded unpaid principal balance 1,691   1,701
Related allowance 0   0
Total loans recorded investment 1,662   1,673
Total loans unpaid principal balance 1,691   1,701
With no related allowance average recorded investment 1,666 1,702  
With no related allowance recorded interest income recognized 17 17  
Total loans average recorded investment 1,666 1,702  
Total loans interest income recognized 17 17  
Mortgage Loans on Real Estate [Member] | Commercial Real Estate [Member]      
Financing Receivable Impaired [Line Items]      
With no related allowance recorded investment 606   608
With no related allowance recorded unpaid principal balance 621   623
Related allowance 0   0
Total loans recorded investment 606   608
Total loans unpaid principal balance 621   623
With no related allowance average recorded investment 607 626  
With no related allowance recorded interest income recognized 2 1  
Total loans average recorded investment 607 626  
Total loans interest income recognized 2 1  
Commercial and industrial [Member]      
Financing Receivable Impaired [Line Items]      
With no related allowance recorded investment 34   15
With no related allowance recorded unpaid principal balance 34   16
With related allowance recorded investment 404   428
With related allowance recorded unpaid principal balance 406   430
Related allowance 130   136
Total loans recorded investment 438   443
Total loans unpaid principal balance 440   446
With no related allowance average recorded investment 37 13  
With no related allowance recorded interest income recognized 0 0  
With related allowance average recorded investment 404 0  
With related allowance recorded interest income recognized 0 0  
Total loans average recorded investment 441 13  
Total loans interest income recognized 0 0  
Consumer [Member]      
Financing Receivable Impaired [Line Items]      
With no related allowance recorded investment 160   153
With no related allowance recorded unpaid principal balance 176   166
With related allowance recorded investment 1,013   855
With related allowance recorded unpaid principal balance 1,036   873
Related allowance 329   287
Total loans recorded investment 1,173   1,008
Total loans unpaid principal balance 1,212   $ 1,039
With no related allowance average recorded investment 226 204  
With no related allowance recorded interest income recognized 1 2  
With related allowance average recorded investment 925 574  
With related allowance recorded interest income recognized 1 3  
Total loans average recorded investment 1,151 778  
Total loans interest income recognized $ 2 $ 5