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LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Ending Loan Balance Individually Evaluated for Impairment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Loans allocated by:        
Individually evaluated for impairment $ 7,973 $ 17,350    
Collectively evaluated for impairment 875,418 764,363    
Total Loans 883,391 781,713    
Allowance for loan losses allocated by:        
Individually evaluated for impairment 43 289    
Collectively evaluated for impairment 12,732 13,279    
Allowance for loan losses, Total 12,775 13,568 $ 14,747 $ 20,965
Commercial        
Loans allocated by:        
Individually evaluated for impairment 3,052 11,832    
Collectively evaluated for impairment 598,769 508,270    
Total Loans 601,821 520,102    
Allowance for loan losses allocated by:        
Individually evaluated for impairment 0 0    
Collectively evaluated for impairment 9,238 9,803    
Allowance for loan losses, Total 9,238 9,803 11,148 14,993
Consumer        
Loans allocated by:        
Individually evaluated for impairment 4,921 5,518    
Collectively evaluated for impairment 276,649 256,093    
Total Loans 281,570 261,611    
Allowance for loan losses allocated by:        
Individually evaluated for impairment 43 289    
Collectively evaluated for impairment 3,080 2,702    
Allowance for loan losses, Total 3,123 2,991 2,381 3,904
Unallocated        
Loans allocated by:        
Individually evaluated for impairment 0 0    
Collectively evaluated for impairment 0 0    
Total Loans 0 0    
Allowance for loan losses allocated by:        
Individually evaluated for impairment 0 0    
Collectively evaluated for impairment 414 774    
Allowance for loan losses, Total 414 774 1,218 2,068
Commercial Real Estate | Commercial        
Loans allocated by:        
Individually evaluated for impairment 2,457 11,093    
Collectively evaluated for impairment 426,410 327,170    
Total Loans 428,867 338,263    
Allowance for loan losses allocated by:        
Individually evaluated for impairment 0 0    
Collectively evaluated for impairment 7,530 7,883    
Allowance for loan losses, Total 7,530 7,883 9,462 13,215
Acquisition and Development | Commercial        
Loans allocated by:        
Individually evaluated for impairment 1 5    
Collectively evaluated for impairment 30,747 50,698    
Total Loans 30,748 50,703    
Allowance for loan losses allocated by:        
Individually evaluated for impairment 0 0    
Collectively evaluated for impairment 580 850    
Allowance for loan losses, Total 580 850 697 670
Commercial and Industrial        
Loans allocated by:        
Total Loans 88,465 73,625    
Commercial and Industrial | Commercial        
Loans allocated by:        
Individually evaluated for impairment 594 734    
Collectively evaluated for impairment 87,871 72,891    
Total Loans 88,465 73,625    
Allowance for loan losses allocated by:        
Individually evaluated for impairment 0 0    
Collectively evaluated for impairment 1,074 1,012    
Allowance for loan losses, Total 1,074 1,012 806 864
Municipal        
Loans allocated by:        
Total Loans 53,741 57,511    
Municipal | Commercial        
Loans allocated by:        
Individually evaluated for impairment 0 0    
Collectively evaluated for impairment 53,741 57,511    
Total Loans 53,741 57,511    
Allowance for loan losses allocated by:        
Individually evaluated for impairment 0 0    
Collectively evaluated for impairment 54 58    
Allowance for loan losses, Total 54 58 183 244
Residential Mortgage | Consumer        
Loans allocated by:        
Individually evaluated for impairment 4,915 5,501    
Collectively evaluated for impairment 269,537 248,589    
Total Loans 274,452 254,090    
Allowance for loan losses allocated by:        
Individually evaluated for impairment 43 281    
Collectively evaluated for impairment 2,936 2,589    
Allowance for loan losses, Total 2,979 2,870 2,262 3,780
Installment and other loans        
Loans allocated by:        
Total Loans 7,118 7,521    
Installment and other loans | Consumer        
Loans allocated by:        
Individually evaluated for impairment 6 17    
Collectively evaluated for impairment 7,112 7,504    
Total Loans 7,118 7,521    
Allowance for loan losses allocated by:        
Individually evaluated for impairment 0 8    
Collectively evaluated for impairment 144 113    
Allowance for loan losses, Total $ 144 $ 121 $ 119 $ 124