Other Commitments and Contingencies and Derivatives - Summary Information Regarding the Derivatives (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Customer Interest Rate Swap [Member]
Dec. 31, 2013
3rd Party Interest Rate Swap [Member]
Loss Contingencies [Line Items]        
Notional amount $ 4,800 $ 35,900 $ 11,268 $ 11,268
Maturity     Oct. 17, 2033 Oct. 17, 2033
Interest rate paid     1 Mo Libor + 175bp Fixed (4.1052%)
Interest rate received     Fixed (4.1052%) 1 Mo Libor + 175bp
Fair value     $ 57 $ (57)