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Equity Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Equity Based Compensation [Abstract]

Schedule of Share-based Compensation, Phantom Units Award Activity [Table Text Block]

A summary of our unit award activity for the years ended December 31, 2015, 2014 and 2013, is set forth below:

		Number of Phantom Units			Weighted-Average Grant Price
Non-vested	December 31, 2012	494,883			22.65
Granted		7,500			34.12
Vested		(184,323	)		22.68
Forfeited		(43,108	)		22.65
Non-vested	December 31, 2013	274,952			22.94
Granted		10,000			35.46
Vested		(69,488	)		23.08
Non-vested	December 31, 2014	215,464			$	23.48
Granted		11,836			$	39.73
Vested		(82,228	)		$	23.55
Non-vested	December 31, 2015	145,072			$	24.76

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- Definition

Equity Based Compensation [Abstract]

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- Definition

Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value.

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