Earnings (Loss) Per Common Unit (Tables)

12 Months Ended

Dec. 31, 2011

	Year ended December 31,

	2011(2)		2010			2009
Net income (loss) attributable to the Partnership	$	60,695	$	467		$	(118,668	)
Less: Income allocable to phantom units		1,749		1,308			1,518

Income (loss) available for common unitholders	$	58,946	$	(841	)	$	(120,186	)

Weighted average common units outstanding—basic		78,466		70,128			60,957
Effect of dilutive instruments(1)		153		—			—

Weighted average common units outstanding—diluted		78,619		70,128			60,957

Net income (loss) attributable to the Partnership's common unitholders per common unit:
Basic	$	0.75	$	(0.01	)	$	(1.97	)

Diluted	$	0.75	$	(0.01	)	$	(1.97	)

(1): For the years ended December 31, 2011 and 2010, dilutive instruments include TSR Phantom Units and are based on the number of units, if any, that would be issuable at the end of the respective reporting period, assuming that date was the end of the contingency period. For the year ended December 31, 2010, 195 units were excluded from the calculation of diluted units because the impact was anti-dilutive. See Note 20 for further discussion of TSR Phantom Units.
(2): The Class B units had no impact to the earnings per unit calculation as they were issued on December 31, 2011 and as such were not outstanding for any portion of the fiscal year and were not allocated any of the Net income (loss) attributable to the Partnership.