Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation (Details 2)

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Equity-Based Compensation (Details 2) - Restricted Stock and Restricted Stock Unit
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2015
USD ($)
$ / shares
shares
Number of shares  
Total granted and unvested at the beginning of the period (in shares) | shares 1,983,673
Granted (in shares) | shares 881,617
Vested (in shares) | shares (358,242)
Forfeited (in shares) | shares (12,016)
Total awarded and unvested at the end of the period (in shares) | shares 2,495,032
Weighted average grant date fair value  
Total granted and unvested at the beginning of the period (in dollars per share) $ 64.71
Granted (in dollars per share) 40.82
Vested (in dollars per share) 64.28
Forfeited (in dollars per share) 40.05
Total awarded and unvested at the end of the period (in dollars per share) $ 56.38
Aggregate intrinsic value  
Total awarded and unvested at the beginning of the period | $ $ 80,497
Total awarded and unvested at the end of the period | $ 52,795
Additional equity compensation to be recognized over the remaining period | $ $ 109,900
Weighted average period for recognizing unrecognized stock-based compensation expense 2 years 9 months 18 days