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Fair Value Measurements - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Investment Securities [Line Items]      
Unrealized gains on securities recorded as other income $ 364 $ 329 $ 19
Interest Rate Swap [Member]
     
Investment Securities [Line Items]      
Fair value of derivative liability $ 0