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Long-Term Compensation - Stock Option and Other Share Based Activity (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Number of Options, Beginning balance 6,253
Number of Options, Exercised (548)
Number of Options, Forfeited/ Expired (193)
Number of Options, Ending balance 6,253
Weighted Average Exercise Price, Ending Balance $ 34.74
Options Exercisable, Number of Options Ending balance 5,511