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Equity Based Compensation (Notes)
6 Months Ended
Jun. 30, 2014
Equity Based Compensation [Abstract]  
Equity Based Compensation
Equity Based Compensation
We incurred a nominal amount and $0.1 million of unit-based compensation expense related to the Partnership during the three and six months ended June 30, 2014, respectively, and $0.1 million during both the three and six months ended June 30, 2013. 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 June 30, 2014, there was $1.0 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 3.4 years.