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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
segment
component
office
Jun. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
investment
Accounting Policies [Abstract]          
Number of offices in which the company operates throughout the country | office     26    
Accounting Policies [Line Items]          
Impairment charge related to investment     $ 0    
Held to maturity or trading securities $ 0   $ 0   $ 0
Number of impairment components | component     2    
Debt securities other than temporarily impaired 0   $ 0   0
Maturity of interest bearing deposits     90 days    
Evaluation period to return past due loans to accrual status     6 months    
Balance of loans serviced for others 322,576,000   $ 322,576,000   317,793,000
Foreclosed real estate totaled 651,000   $ 651,000   $ 710,000
Percentage of limited partner interest     99.00%    
Number of investments accounted for under the proportional amortization method | investment         1
Investment in real estate partnership 5,187,000   $ 5,187,000   $ 5,450,000
Investment in real estate partnerships, proportional amortization method 2,098,000   2,098,000   2,205,000
Loss investment in real estate partnership 89,000 $ 99,000 178,000 $ 184,000  
Losses on investments accounted for under the proportional amortization method 53,000   86,000    
Recognition of federal tax credits 184,000 119,000 368,000 238,000  
Advertising expense 202,000 $ 144,000 353,000 $ 256,000  
Accumulated other comprehensive income (loss), net of taxes 7,421,000   $ 7,421,000   1,199,000
Number of significant operating segment | segment     1    
Other Assets          
Accounting Policies [Line Items]          
Mortgage servicing rights $ 2,698,000   $ 2,698,000   $ 2,672,000
Deposit Premium          
Accounting Policies [Line Items]          
Finite lives of intangible assets     10 years    
Customer Lists          
Accounting Policies [Line Items]          
Finite lives of intangible assets     15 years    
Maximum | Building and Improvements          
Accounting Policies [Line Items]          
Plant and equipment, useful life     40 years    
Maximum | Furniture and Equipment          
Accounting Policies [Line Items]          
Plant and equipment, useful life     15 years    
Minimum | Building and Improvements          
Accounting Policies [Line Items]          
Plant and equipment, useful life     10 years    
Minimum | Furniture and Equipment          
Accounting Policies [Line Items]          
Plant and equipment, useful life     3 years