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Share-based Compensation Plans - Schedule of Stock Option Activity (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Outstanding at the beginning of the period (in shares) 1,945,955
Granted 466,250
Exercised (79,949)
Forfeited (408,077)
Outstanding at the end of the period (in shares) 1,924,179
Vested and expected to vest 1,839,383
Options exercisable (in shares) 1,367,269
Outstanding at the beginning of the period (in dollars per share) $ 34.50
Granted $ 28.51
Exercised $ 23.25
Forfeited $ 36.33
Outstanding at the end of the period (in dollars per share) $ 33.12
Vested and expected to vest $ 33.50
Options exercisable $ 34.35
Options outstanding, weighted average remaining contractual term 4 years 4 months 28 days
Options vested and expected, weighted average remaining contractual term 4 years 2 months 1 day
Options exercisable, weighted average remaining contractual term 2 years 10 months 21 days