Stock-Based Compensation - Schedule of Stock Option Activity and Weighted Average Exercise Prices (Details) - Employee Stock Option $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) $ / shares shares
Options
Outstanding at January 1, 2016 (in shares) | shares	1,178,585
Granted (in shares) | shares	194,740
Forfeited (in shares) | shares	(192,304)
Exercised (in shares) | shares	(105,207)
Unearned performance-based options (in shares) | shares	(23,328)
Outstanding at September 30, 2016 (in shares) | shares	1,052,486
Options exercisable at September 30, 2016 (in shares) | shares	816,776
Weighted- Average Exercise Price
Outstanding at January 1, 2016 (in dollars per share) | $ / shares	$ 48.14
Granted (in dollars per share) | $ / shares	33.17
Forfeited (in dollars per share) | $ / shares	45.59
Exercised (in dollars per share) | $ / shares	17.66
Unearned performance-based options (in dollars per share) | $ / shares	59.97
Outstanding at September 30, 2016 (in dollars per share) | $ / shares	48.61
Options exercisable at September 30, 2016 (in dollars per share) | $ / shares	$ 50.64
Weighted-Average Remaining Contractual Term (Years)
Weighted-Average Remaining Contractual Term in Years Outstanding at September 31, 2016	4 years 7 months 6 days
Weighted-Average Remaining Contractual Term in Years Options Exercisable at September 31, 2016	2 years 3 months 18 days
Aggregate Intrinsic Value as of September 30, 2016
Aggregate Intrinsic Value Outstanding at September 31, 2016 | $	$ 1,070,788
Aggregate Intrinsic Value of Options Exercisable at September 31, 2016 | $	$ 258,330