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Stock-Based Compensation	6 Months Ended
Stock-Based Compensation	Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation Stock-based compensation totaled approximately $12.5 million and $22.8 million for the three and six months ended June 30, 2016, respectively. Stock-based compensation totaled approximately $14.9 million and $31.3 million for the three and six months ended June 30, 2015, respectively.