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Long-Term Incentive Plans (Tables)
12 Months Ended
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Activity in Outstanding Grants
A summary of activity in the outstanding grants during 2015 is as follows (in thousands):
 
Phantom Units
Outstanding grants at January 1, 2015
115

Grants during the period
52

Grants vested and paid during the period
(29
)
Forfeitures during the period
(12
)
Outstanding grants at December 31, 2015
126