Stock-Based Awards - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Stock Options Outstanding, Shares
Shares outstanding, beginning of period (in shares)	7,264
Granted (in shares)	101
Exercised (in shares)	(978)
Forfeited (in shares)	(346)
Shares outstanding, period end (in shares)	6,041	7,264
Stock Options Outstanding, Weighted Average Exercise Price
Weighted average exercise price, outstanding, beginning of period (in usd per share)	$ 30.75
Weighted average exercise price, granted (in usd per share)	38.67
Weighted average exercise price, exercised (in usd per share)	19.33
Weighted average exercise price, forfeited (in usd per share)	43.17
Weighted average exercise price, outstanding, period end (in usd per share)	$ 32.01	$ 30.75
Stock Options, Additional Disclosures
Weighted average remaining contractual term, outstanding	6 years 2 months 16 days	7 years 27 days
Aggregate intrinsic value, outstanding	$ 74,989	$ 63,328
Exercisable (in shares)	4,899
Weighted average exercise price, exercisable (in usd per share)	$ 29.76
Weighted average remaining contractual term, exercisable	5 years 10 months 9 days
Aggregate intrinsic value, exercisable	$ 71,182
Stock Options Vested and Expected to Vest
Shares vested and expected to vest (in shares)	5,999
Weighted average exercise price, vested and expected (in usd per share)	$ 31.95
Weighted average remaining contractual term, vested and expected to vest	6 years 2 months 12 days
Aggregate intrinsic value, vested and expected to vest	$ 74,816