Equity-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

A summary of our unit award activity for the six months ended June 30, 2015, is set forth below:

	Number of Phantom Units		Weighted Average Grant Date Fair Value
Not vested at December 31, 2014	280,251		$	28.30
Awards granted	56,485		29.48
Awards vested	(51,951	)	27.97
Awards forfeited	(11,913	)	30.78
Not vested at June 30, 2015	272,872		28.50