Stock-Based Compensation - Schedule of Summary of Stock Option Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares
Shares (in thousands)
Outstanding at January 1, 2016 (in shares) | shares	1,524
Exercised (in shares) | shares	(643)
Forfeited (in shares) | shares	(7)
Outstanding at December 31, 2016 (in shares) | shares	874
Exercisable at December 31, 2016 (in shares) | shares	829
Vested or expected to vest December 31, 2016 (in shares) | shares	870
Weighted Average Exercise Price
Outstanding at January 1, 2016 (in dollars per share) | $ / shares	$ 32.39
Exercised (in dollars per share) | $ / shares	28.17
Forfeited (in dollars per share) | $ / shares	29.69
Outstanding at December 31, 2016 (in dollars per share) | $ / shares	35.51
Exercisable at December 31, 2016 (in dollars per share) | $ / shares	35.58
Vested or expected to vest December 31, 2016 (in dollars per share) | $ / shares	$ 35.52
Weighted Average Remaining Contractual Term & Aggregate Intrinsic Value
Outstanding at December 31, 2016	2 years 4 months 10 days
Exercisable at December 31, 2016	2 years 2 months 27 days
Vested or expected to vest December 31, 2016	2 years 4 months 6 days
Outstanding at December 31, 2016 | $	$ 27,261
Exercisable at December 31, 2016 | $	25,781
Vested or expected to vest December 31, 2016 | $	$ 27,123