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Unit-Based Compensation and Distributions
6 Months Ended
Jun. 30, 2011
Unit-Based Compensation and Distributions [Abstract]  
Unit-Based Compensation and Distributions
11. Unit-Based Compensation and Distributions
     A summary of the Company’s nonvested phantom units as of June 30, 2011 and the changes during the six months ended June 30, 2011is presented below:
                 
            Weighted Average  
            Grant Date  
Nonvested Phantom Units   Grant     Fair Value  
Nonvested at December 31, 2010
    105,492     $ 17.68  
Granted
    47,927       21.31  
Vested
    (48,900 )     19.58  
Forfeited
           
 
           
Nonvested at June 30, 2011
    104,519     $ 18.46  
 
           
     For the three months ended June 30, 2011 and 2010, compensation expense of $653 and $145, respectively, was recognized in the unaudited condensed consolidated statements of operations related to vested phantom unit grants. For the six months ended June 30, 2011 and 2010, compensation expense of $1,282 and $292, respectively, was recognized in the unaudited condensed statements of operations related to vested phantom unit grants. As of June 30, 2011 and 2010, there was a total of $1,929 and $899, respectively, of unrecognized compensation costs related to nonvested phantom unit grants. These costs are expected to be recognized over a weighted-average period of approximately three years.
     The Company’s distribution policy is as defined in its partnership agreement. For the three months ended June 30, 2011 and 2010, the Company made distributions of $19,311 and $16,391, respectively, to its partners. For the six months ended June 30, 2011 and 2010, the Company made distributions of $36,258 and $32,788, respectively, to its partners.