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Commitments and Contingencies - Summary of Outstanding Commitments to Originate Loans and to Advance Additional Amounts (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Standby Letters of Credit [Member]
   
Other Commitments [Line Items]    
Contract Amount $ 1,253 $ 2,907
Available Portion of Lines of Credit [Member]
   
Other Commitments [Line Items]    
Contract Amount 60,755 59,124
Undisbursed Portion of Loans in Process [Member]
   
Other Commitments [Line Items]    
Contract Amount 72,333 47,678
Commitments to Originate Loans [Member]
   
Other Commitments [Line Items]    
Contract Amount $ 48,854 $ 77,857