Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Share-based Compensation

Schedule of service phantom interest and performance phantom interest values

	December 31,
	2010		2009
Service Phantom interest (per point)	$	14.64	$	11.37
Performance Phantom interest (per point)	$	21.25	$	5.48

Summary of the status of non-vested shares

	Shares			Weighted- Average Grant-Date Fair Value		Aggregate Intrinsic Value (in thousands)
Non-vested at December 31, 2008		78,666		$	6.62	$	315
Granted		202,257			6.68
Vested		(100,763	)		6.86
Forfeited		(3,100	)		4.14
Non-vested at December 31, 2009		177,060		$	6.59	$	1,215
Granted		1,307,378			11.42
Vested		(113,457	)		9.79
Forfeited		(1,799	)		4.14
Non-vested at December 31, 2010		1,369,182		$	10.94	$	20,784
Granted		826,959			18.79
Vested		(557,355	)		11.83
Forfeited		(4,632	)		8.67
Non-vested at December 31, 2011		1,634,154		$	14.62	$	23,887

Summary of activity and price information regarding stock options granted

	Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term
Outstanding, December 31, 2008		32,350		$	19.08		9.21
Granted		—			—
Exercised		—			—
Forfeited		—			—
Expired		—			—
Outstanding, December 31, 2009		32,350		$	19.08		8.21
Granted		—			—
Exercised		—			—
Forfeited		(3,149	)		21.61
Expired		(6,301	)		21.61
Outstanding, December 31, 2010		22,900		$	18.03		8.35
Granted		—			—
Exercised		—			—
Forfeited		—			—
Expired		—			—
Outstanding, December 31, 2011		22,900		$	18.03		7.35
Exercisable at December 31, 2011		22,900		$	18.03		7.35

CALLC, CALLC II and CALLC III

Share-based Compensation

Schedule of key information for share-based compensation plans related to override units

						Compensation Expense Increase (Decrease) for the Year Ended December 31,
	Benchmark Value (per Unit)		Original Awards Issued
Award Type					Grant Date	2011		2010		2009
						(in thousands)
Override Operating Units(a)	$	11.31		919,630	June 2005	$	—	$	338	$	1,369
Override Operating Units(b)	$	34.72		72,492	December 2006		—		13		36
Override Value Units(c)	$	11.31		1,839,265	June 2005		4,960		17,586		2,690
Override Value Units(d)	$	34.72		144,966	December 2006		451		581		37
Override Units(e)	$	10.00		642,219	February 2008		184		772		26
					Total	$	5,595	$	19,290	$	4,158

Schedule of significant assumption used in the valuation of the Units

	December 31,
	2010	2009
Estimated forfeiture rate	None	None
Derived Service Period	Based on forfeiture schedule	Based on forfeiture schedule
Estimated fair value (per unit)	$2.60	$0.08
Marketability and minority interest discount	10.0%	20.0%
Volatility	47.6%	59.7%

Override Operating Units | CALLC and CALLC II

Share-based Compensation

Schedule of significant assumption used in the valuation of the Units

	(a) Override Operating Units December 31,			(b) Override Operating Units December 31,
	2009			2009
Estimated forfeiture rate		None			None
CVR closing stock price	$	6.86		$	6.86
Estimated weighted-average fair value (per unit)	$	11.95		$	1.40
Marketability and minority interest discounts		20.0	%		20.0	%
Volatility		50.7	%		50.7	%

Override Value Units | CALLC and CALLC II

Share-based Compensation

Schedule of significant assumption used in the valuation of the Units

	(a) Override Operating Units December 31,			(b) Override Operating Units December 31,
	2009			2009
Estimated forfeiture rate		None			None
CVR closing stock price	$	6.86		$	6.86
Estimated weighted-average fair value (per unit)	$	11.95		$	1.40
Marketability and minority interest discounts		20.0	%		20.0	%
Volatility		50.7	%		50.7	%