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Equity Based Plans - Summary of Intrinsic Value of Stock Options Exercised (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Stock Options Exercised 879,391 272,750 375,080
Aggregate Intrinsic Value $ 402 $ 3,459 $ 3,160