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Office Properties and Equipment - Summary of Office Properties and Equipment (Detail) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Total office properties and equipment, Gross $ 43,919,000 $ 42,572,000
Less accumulated depreciation 13,216,000 11,795,000
Total office properties and equipment, net 30,702,635 30,777,184
Land [Member]
    
Property, Plant and Equipment [Line Items]    
Total office properties and equipment, Gross 10,330,000 10,330,000
Building and Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Total office properties and equipment, Gross 23,170,000 22,809,000
Furniture and Equipment [Member]
    
Property, Plant and Equipment [Line Items]    
Total office properties and equipment, Gross $ 10,419,000 $ 9,433,000