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Investment Securities (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Investment [Line Items]    
Securities available for sale, Amortized Cost $ 109,926 $ 120,311
Securities available for sale, Gross Unrealized Gains 1,128 2,811
Securities available for sale, Gross Unrealized Losses 2,292 149
Securities available for sale, Fair Value 108,762 122,973
Securities held to maturity, Amortized Cost 9 12
Securities held to maturity, Gross Unrealized Gains 0 0
Securities held to maturity, Gross Unrealized Losses 0 0
Securities held to maturity, Fair Value 9 12
Agency mortgage-backed securities
   
Investment [Line Items]    
Securities available for sale, Amortized Cost 18,408 22,762
Securities available for sale, Gross Unrealized Gains 205 456
Securities available for sale, Gross Unrealized Losses 244 12
Securities available for sale, Fair Value 18,369 23,206
Securities held to maturity, Amortized Cost 9 12
Securities held to maturity, Gross Unrealized Gains 0 0
Securities held to maturity, Gross Unrealized Losses 0 0
Securities held to maturity, Fair Value 9 12
Agency CMO
   
Investment [Line Items]    
Securities available for sale, Amortized Cost 20,486 22,458
Securities available for sale, Gross Unrealized Gains 96 225
Securities available for sale, Gross Unrealized Losses 341 23
Securities available for sale, Fair Value 20,241 22,660
Agency notes and bonds
   
Investment [Line Items]    
Securities available for sale, Amortized Cost 31,594 38,273
Securities available for sale, Gross Unrealized Gains 49 290
Securities available for sale, Gross Unrealized Losses 729 10
Securities available for sale, Fair Value 30,914 38,553
Municipal obligations
   
Investment [Line Items]    
Securities available for sale, Amortized Cost 36,200 32,605
Securities available for sale, Gross Unrealized Gains 778 1,800
Securities available for sale, Gross Unrealized Losses 938 88
Securities available for sale, Fair Value 36,040 34,317
Debt Securities
   
Investment [Line Items]    
Securities available for sale, Amortized Cost 106,688 116,098
Securities available for sale, Gross Unrealized Gains 1,128 2,771
Securities available for sale, Gross Unrealized Losses 2,252 133
Securities available for sale, Fair Value 105,564 118,736
Mutual fund investment
   
Investment [Line Items]    
Securities available for sale, Amortized Cost 3,238 4,213
Securities available for sale, Gross Unrealized Gains 0 40
Securities available for sale, Gross Unrealized Losses 40 16
Securities available for sale, Fair Value $ 3,198 $ 4,237