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Derivatives - Summary of Types of Derivatives by Assets and Liabilities (Detail) (Forward starting interest rate swap [Member], Other Liabilities [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Forward starting interest rate swap [Member] | Other Liabilities [Member]
   
Derivative Instruments, Gain (Loss) [Line Items]    
Asset Derivatives $ 0 $ 0
Liability Derivatives $ 2,890 $ 4,085