Equity-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2011

Common Unit Options [Member]

Common Unit Options Activity

The common unit options activity during the nine months ended September 30, 2011 is as follows:

Common Unit Options	Units		Weighted Average Exercise Price		Weighted Average Contractual Term (Years)	Aggregate Intrinsic Value *
Outstanding at beginning of period	201,950		$	21.93
Granted	—		—
Exercised	(38,300	)	20.84			$	224
Forfeited or expired	(6,800	)	26.72
Outstanding at end of period	156,850		21.99		4.6	200
Exercisable at end of period	156,850					200

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* Intrinsic value equals the closing market price of a unit less the option strike price, multiplied by the number of unit options outstanding as of the end of the period presented. Unit options with an exercise price greater than the end of the period closing market price are excluded.

Phantom Units [Member]

Phantom Units Activity

The following table presents phantom units activity for the nine months ended September 30, 2011:

Phantom Units	Units		Weighted Average Grant Date Fair Value
Outstanding at beginning of period	742,517		$	23.61
Service condition grants	76,745		26.07
Market condition grants	—		—
Vested service condition	(20,980	)	20.69
Vested market condition	(8,550	)	19.52
Forfeited service condition	(67,807	)	25.06
Forfeited market condition	(8,700	)	19.52
Outstanding at end of period	713,225		24.78