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FAIR VALUE OF INSTRUMENTS - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]      
Interest-bearing deposits maturing date 90 days    
Carrying amounts of dividends payable, number of days 40 days    
Impaired loans categorized as Level 3 $ 4,521 $ 4,591 $ 4,354
Specific allocation for impaired loans 771   557
Impairment of mortgage servicing rights   16  
Asset impairment charges 0 0  
Level 3 [Member]
      
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]      
Impaired loans categorized as Level 3 4,500 4,600  
Fair Value on a Recurring Basis [Member]
      
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]      
Specific allocation for impaired loans $ 771 $ 865