Long-Term Incentive Compensation (Tables)
 3 Months Ended
Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Summary of changes in non-vested restricted shares
A summary of the changes in our non-vested restricted shares for the quarter ended March 31, 2015 is presented below:
 
 
Number of Shares
 
Weighted Average
Grant Date Fair Value
per Share
 
Non-vested at December 31, 2014
 
1,033,394

 
$
19.80

 
Granted
 
3,538,385

 
9.38

 
Vested
 
(2,564
)
 
19.82

 
Forfeited
 
(7,223
)
 
16.21

 
Non-vested at March 31, 2015
 
4,561,992

 
$
11.72