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Equity Based Compensation (Notes)
3 Months Ended
Mar. 31, 2016
Equity Based Compensation [Abstract]  
Equity Based Compensation
Equity Based Compensation

We incurred approximately $0.1 million of unit-based compensation expense related to the Partnership during the three months ended March 31, 2016 and 2015, respectively. These amounts are included in general and administrative expenses in the accompanying condensed consolidated statements of income and comprehensive income. 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. All awards made through June 9, 2015 vest over a five-year service period unless such awards are amended in accordance with the LTIP. Beginning June 10, 2015, all awards made to only non-employee directors vest over a three-year service period unless such awards are amended in accordance with the LTIP. As of March 31, 2016, there was $0.9 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 2.0 years.