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Equity Based Compensation (Notes)
3 Months Ended
Mar. 31, 2014
Equity Based Compensation [Abstract]  
Equity Based Compensation
Equity Based Compensation
We incurred $0.1 million and a nominal amount of unit-based compensation expense related to the Partnership during the three months ended March 31, 2014 and 2013, respectively. The fair value of phantom unit awards under the LTIP is determined based on the closing price of our common limited partner units on the grant date. The estimated fair value of our phantom units is amortized over the vesting period using the straight line method. Awards vest over a five-year service period. As of March 31, 2014, there was $0.8 million of total unrecognized compensation cost related to non-vested equity-based compensation arrangements, which is expected to be recognized over a weighted-average period of 3.7 years.