Equity-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Restricted (Non-Vested) Common Unit Activity

Restricted (non-vested) common unit activity for the years ended December 31, 2010, and 2009 is as follows:

2010
Restricted (Non-Vested) Common Units	Units		Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period	464,009		$	28.36
Granted	—		—
Vested	(444,759	)	28.19
Forfeited or expired	(19,250	)	32.35
Outstanding at the end of period	—		—
2009
Restricted (Non-Vested) Common Units	Units		Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period	704,050		$	29.26
Granted	24,500		11.13
Vested	(176,291	)	29.78
Forfeited or expired	(88,250	)	27.96
Outstanding at the end of period	464,009		28.36

Common Unit Options [Member]

Common Unit Options Activity

The common unit options activity for the years ended December 31, 2011, 2010, and 2009 is as follows:

2011
Common Unit Options	Units		Weighted Average Exercise Price		Weighted Average Contractual Term (Years)	Aggregate Intrinsic Value* (in thousands)
Outstanding at the 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		4.3	498
Exercisable at the end of the period	156,850					498
2010
Common Unit Options	Units		Weighted Average Exercise Price		Weighted Average Contractual Term (Years)	Aggregate Intrinsic Value* (in thousands)
Outstanding at the beginning of period	306,651		$	21.50
Granted	—		—
Exercised	(100,200	)	20.60			$	444
Forfeited or expired	(4,501	)	23.73
Outstanding at end of period	201,950		21.93		5.3	1,087
Exercisable at the end of the period	201,950					1,087
2009
Common Unit Options	Units		Weighted Average Exercise Price		Weighted Average Contractual Term (Years)	Aggregate Intrinsic Value* (in thousands)
Outstanding at the beginning of period	431,918		$	21.31
Granted	—		—
Exercised	—		—			$	—
Forfeited or expired	(125,267	)	20.87
Outstanding at end of period	306,651		21.50		6.3	184
Exercisable at the end of the period	306,651					184

 _______________________

* 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]

Restricted (Non-Vested) Common Unit Activity

The following table presents phantom unit activity for the years ended December 31, 2011, 2010 and 2009:

2011
Phantom Units	Units		Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period	742,517		$	23.61
Service condition grants	596,320		24.55
Market condition grants	—		—
Vested service condition	(142,520	)	24.73
Vested market condition	(8,550	)	19.52
Forfeited service condition	(88,474	)	24.99
Forfeited market condition	(12,900	)	19.52
Total outstanding at end of period	1,086,393		24.51
2010
Phantom Units	Units		Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period	301,700		$	8.63
Service condition grants	716,200		24.72
Market condition grants	148,500		11.89
Vested service condition	(166,173	)	11.63
Vested market condition	(200,610	)	5.85
Forfeited service condition	(18,787	)	20.18
Forfeited market condition	(38,313	)	11.43
Total outstanding at end of period	742,517		23.61
2009
Phantom Units	Units		Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period	—		$	—
Service condition grants	133,480		13.43
Market condition grants	174,720		4.64
Vested service condition	—		—
Vested market condition	—		—
Forfeited service condition	(2,600	)	12.46
Forfeited market condition	(3,900	)	4.49
Total outstanding at end of period	301,700		8.63