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Fair Value Disclosures - Summary of Assets and Liabilities Measured on Recurring Basis (Detail) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities $ 149,632,153 $ 157,255,828
Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities 149,632,000 157,256,000
Fair Value, Measurements, Recurring [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities 149,632,000 157,256,000
Fair Value, Measurements, Recurring [Member] | U.S. Agency Mortgage-Backed [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities 96,785,000 102,513,000
Fair Value, Measurements, Recurring [Member] | Non-U.S. Agency Mortgage-Backed [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities 9,749,000 12,668,000
Fair Value, Measurements, Recurring [Member] | Municipal Bonds [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities 19,799,000 17,585,000
Fair Value, Measurements, Recurring [Member] | U.S. Government Agency [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities 23,299,000 24,490,000
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities      
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | U.S. Agency Mortgage-Backed [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities      
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Non-U.S. Agency Mortgage-Backed [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities      
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Municipal Bonds [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities      
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | U.S. Government Agency [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities      
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities 149,632,000 157,256,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | U.S. Agency Mortgage-Backed [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities 96,785,000 102,513,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Non-U.S. Agency Mortgage-Backed [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities 9,749,000 12,668,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Municipal Bonds [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities 19,799,000 17,585,000
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | U.S. Government Agency [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities 23,299,000 24,490,000
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities      
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | U.S. Agency Mortgage-Backed [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities      
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Non-U.S. Agency Mortgage-Backed [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities      
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Municipal Bonds [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities      
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | U.S. Government Agency [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for sale securities