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Share-Based Compensation Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Disclosure Share Based Compensation Expenses [Abstract]        
Option plan $ 6,310 $ 5,866 $ 18,263 $ 16,843
Restricted Stock or Unit Expense 8,103 23,810 19,202 41,915
Total share-based compensation before tax 14,413 29,676 37,465 58,758
Tax benefit 5,376 11,073 13,990 21,939
Total share-based compensation expense included in net income $ 9,037 $ 18,603 $ 23,475 $ 36,819