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Deposits - Summary of Major Types of Deposits (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Banking and Thrift [Abstract]    
Non-interest-bearing $ 277,136 $ 207,608
Interest-bearing checking 888,008 913,753
Money market deposit 110,721 116,947
Savings 294,059 290,512
Time deposits 211,303 217,943
Total deposits $ 1,781,227 $ 1,746,763