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Information Pertaining to Held to Maturity Securities With Gross Unrealized Losses (Detail) (Corporate Bonds, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Corporate Bonds
   
Schedule of Held-to-maturity Securities [Line Items]    
Fair Value $ 31,453 $ 22,785
Gross Unrealized Losses $ (43) $ (41)