Stock-Based Compensation	9 Months Ended
Stock-Based Compensation	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Incentive Award Plan and Employee Stock Purchase Plan	10. Stock-based Compensation Stock-based compensation expense, which is included in SG&A expenses, was $6.3 million and $6.1 million for the three months ended September 30, 2016 and 2015, respectively, and $19.8 million and $15.2 million for the nine months ended September 30, 2016 and 2015, respectively.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.