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Investment Securities - Amortized Cost and Fair Value of Available-for-Sale Debt Securities by Contractual Maturity (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Schedule of Available-for-sale Securities [Line Items]  
Amortized Cost $ 37,609
Fair Value 36,815
Corporate Bonds [Member]
  
Schedule of Available-for-sale Securities [Line Items]  
Corporate bonds 5 to 10 years, Amortized Cost 9,000
Corporate bonds 5 to 10 years, Fair Value 8,938
U. S. Government Agency Bonds [Member]
  
Schedule of Available-for-sale Securities [Line Items]  
U.S. Government agency bonds less than 5 years, Amortized Cost 2,500
Corporate bonds 5 to 10 years, Amortized Cost 5,000
U.S. Government agency bonds less than 5 years, Fair Value 2,458
Corporate bonds 5 to 10 years, Fair Value 4,787
U. S. Government Agency Mortgage-Backed Securities [Member]
  
Schedule of Available-for-sale Securities [Line Items]  
U.S. Government agency mortgage - backed securities, Amortized Cost 21,109
U.S. Government agency mortgage - backed securities, Fair Value $ 20,632