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Stock-Based Compensation (Detail) - (Table 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Total $ 20,141 $ 17,434 $ 11,404
Restricted Stock [Member]
     
Allocated Share-based Compensation Expense 15,097 11,622 5,787
Stock Options [Member]
     
Allocated Share-based Compensation Expense $ 5,044 $ 5,812 $ 5,617