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Share-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Disclosure Share Based Compensation Additional Information [Abstract]  
Unrecognized compensation cost related to unvested share-based equity awards $ 93,829
Weighted average period of recognition of unvested share-based equity awards 1 year 9 months 28 days
Unrecognized compensation cost related to unvested share-based equity awards, stock options 53,675
Unrecognized compensation cost related to unvested share-based equity awards, restricted stock $ 40,154