Stock-Based Compensation - Schedule of Assumptions Used in Determining the Estimated the Fair Value of Stock Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assumptions used in determining the estimated fair value of stock options
Risk-free interest rate (as a percent)	1.56%	2.17%	1.08%
Expected option life, Executive	6 years 10 months 2 days	6 years 10 months 17 days	6 years 3 months 26 days
Expected option life, Non-Executive	6 years 1 month 2 days	6 years 2 months 5 days	4 years 9 months 18 days
Dividend yield (as a percent)	1.00%
Volatility (as a percent)	35.59%	37.52%	40.12%
Weighted-average fair value per option granted	$ 14.95	$ 17.91	$ 11.07