Equity-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Restricted (Non-Vested) Common Unit Activity

Restricted (non-vested) common unit activity for the year ended December 31, 2010 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	—		—

Common Unit Options

Common Unit Options Activity

The common unit options activity for the years ended December 31, 2012, 2011, and 2010 is as follows:

2012
Common Unit Options	Units		Weighted Average Exercise Price
Outstanding at the beginning of period	156,850		$	21.99
Forfeited or expired	(300	)	23.73
Outstanding at end of period	156,550		21.96
Exercisable at the end of the period	156,550
2011
Common Unit Options	Units		Weighted Average Exercise Price
Outstanding at the beginning of period	201,950		$	21.93
Exercised	(38,300	)	20.84
Forfeited or expired	(6,800	)	26.72
Outstanding at end of period	156,850		21.99
Exercisable at the end of the period	156,850
2010
Common Unit Options	Units		Weighted Average Exercise Price
Outstanding at the beginning of period	306,651		$	21.50
Exercised	(100,200	)	20.60
Forfeited or expired	(4,501	)	23.73
Outstanding at end of period	201,950		21.93
Exercisable at the end of the period	201,950

Phantom Units

Restricted (Non-Vested) Common Unit Activity

The following table presents phantom unit activity for the years ended December 31, 2012, 2011 and 2010:

2012
Phantom Units	Units		Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period	1,086,393		$	24.51
Service condition grants	503,625		21.39
Vested service condition	(223,258	)	24.71
Vested market condition	(10,200	)	19.52
Forfeited service condition	(120,868	)	24.85
Forfeited market condition	(4,350	)	19.52
Total outstanding at end of period	1,231,342		23.22
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
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