Stock-Based Compensation	6 Months Ended
Stock-Based Compensation	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation Stock-based compensation totaled approximately $8.6 million and $16.2 million for the three and six months ended June 30, 2017, respectively. Stock-based compensation totaled approximately $12.5 million and $22.8 million for the three and six months ended June 30, 2016, 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.