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Benefit Plans - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Chief Lending Officer [Member]
Dec. 31, 2013
401(k) Match and Profit Sharing Plan [Member]
Dec. 31, 2012
401(k) Match and Profit Sharing Plan [Member]
Dec. 31, 2011
401(k) Match and Profit Sharing Plan [Member]
Dec. 31, 2013
Salary Continuation Agreements [Member]
Employees
Dec. 31, 2007
Salary Continuation Agreements [Member]
Dec. 31, 2013
Salary Continuation Agreements [Member]
Chief Executive Officer [Member]
Installment
Dec. 31, 2013
Salary Continuation Agreements [Member]
Chief Lending Officer [Member]
Dec. 31, 2013
Salary Continuation Agreements [Member]
Chief Executive Officer and Chief Lending Officer [Member]
Dec. 31, 2012
Salary Continuation Agreements [Member]
Chief Executive Officer and Chief Lending Officer [Member]
Benefit Plans [Line Items]                          
Percent of contributions made by plan participants         75.00%                
Percent of matching contributions made by company         4.00%                
Matching contributions made by company, amount         $ 335,000 $ 386,000 $ 358,000            
Eligibility to participate in ESOP based on service 6 months                        
Eligibility age to participate in ESOP 21 years                        
Contributions for the plan necessary to amortize the debt to the company, period 20 years                        
Compensation cost related to ESOP 653,000 612,000 520,000                    
Fair value of the unearned ESOP shares 9,928,000 10,264,000                      
Number of employees covered               2          
Period of stated annual benefit               10 years          
Age after which employees will be entitled to a stated annual benefit                   62 years 65 years    
Vested period                     10 years    
Percent of period vested                 50.00%        
Period of vested benefits, in the event of early retirement       120 months       120 months          
Executive's beneficiary ratio               2          
Period for which executive's beneficiary will receive upon death                   5 years 120 months    
Distribution of fully vested annual benefit in equal installments                   12      
Annual benefits distribution period                   10 years      
Stated annual benefit for executive                     10 years    
Period of separation from service                     24 months    
Delay in periods                     6 months    
Post retirement liability outstanding                       $ 958,000 $ 835,000