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Investment Securities (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Investment [Line Items]    
Securities available for sale, Amortized Cost $ 106,678 $ 109,926
Securities available for sale, Gross Unrealized Gains 1,449 1,128
Securities available for sale, Gross Unrealized Losses 873 2,292
Securities available for sale, Fair Value 107,254 108,762
Securities held to maturity, Amortized Cost 8 9
Securities held to maturity, Gross Unrealized Gains 0 0
Securities held to maturity, Gross Unrealized Losses 0 0
Securities held to maturity, Fair Value 8 9
Agency mortgage-backed securities
   
Investment [Line Items]    
Securities available for sale, Amortized Cost 28,006 18,408
Securities available for sale, Gross Unrealized Gains 225 205
Securities available for sale, Gross Unrealized Losses 126 244
Securities available for sale, Fair Value 28,105 18,369
Securities held to maturity, Amortized Cost 8 9
Securities held to maturity, Gross Unrealized Gains 0 0
Securities held to maturity, Gross Unrealized Losses 0 0
Securities held to maturity, Fair Value 8 9
Agency CMO
   
Investment [Line Items]    
Securities available for sale, Amortized Cost 17,660 20,486
Securities available for sale, Gross Unrealized Gains 121 96
Securities available for sale, Gross Unrealized Losses 219 341
Securities available for sale, Fair Value 17,562 20,241
Agency notes and bonds
   
Investment [Line Items]    
Securities available for sale, Amortized Cost 25,382 31,594
Securities available for sale, Gross Unrealized Gains 48 49
Securities available for sale, Gross Unrealized Losses 251 729
Securities available for sale, Fair Value 25,179 30,914
Municipal obligations
   
Investment [Line Items]    
Securities available for sale, Amortized Cost 33,257 36,200
Securities available for sale, Gross Unrealized Gains 1,053 778
Securities available for sale, Gross Unrealized Losses 262 938
Securities available for sale, Fair Value 34,048 36,040
Debt Securities
   
Investment [Line Items]    
Securities available for sale, Amortized Cost 104,305 106,688
Securities available for sale, Gross Unrealized Gains 1,447 1,128
Securities available for sale, Gross Unrealized Losses 858 2,252
Securities available for sale, Fair Value 104,894 105,564
Mutual fund investment
   
Investment [Line Items]    
Securities available for sale, Amortized Cost 2,373 3,238
Securities available for sale, Gross Unrealized Gains 2 0
Securities available for sale, Gross Unrealized Losses 15 40
Securities available for sale, Fair Value $ 2,360 $ 3,198