EXHIBIT 12.1

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

The following table sets forth our ratio of earnings to fixed charges for each of the periods shown on a consolidated basis. For purposes of determining the ratio of earnings to fixed charges, earnings are defined as earnings (loss) from continuing operations before income taxes, plus fixed charges. Fixed charges consist of interest expense on all indebtedness, amortization of debt discount, amortization of deferred financing costs and an interest factor attributable to operating leases.

	Fiscal Years Ended December 31,															Three Months Ended  March 31, 2012
	2007			2008			2009			2010			2011
Earnings
Income from continuing operations before provision for income taxes	$	111,858		$	366,287		$	447,662		$	518,894		$	473,547		$	145,537
Income from equity investees		(25,136	)		(42,073	)		(36,531	)		(45,443	)		(49,491	)		(12,013	)
Distributed income from equity investees		19,902			32,897			33,705			33,882			39,995			2,941
Interest and amortization of deferred finance costs		356,488			643,397			643,608			647,593			644,410			152,175
Amortization of capitalized interest		881			1,468			2,021			2,421			2,882			3,285
Implicit rental interest expense		36,696			55,440			59,384			62,116			63,695			16,806
Total Earnings	$	500,689		$	1,057,416		$	1,149,849		$	1,219,463		$	1,175,038		$	308,731
Fixed Charges
Interest and amortization of deferred finance costs	$	356,488		$	643,397		$	643,608		$	647,593		$	644,410		$	152,175
Capitalized interest		19,009			22,087			16,649			11,316			20,998			7,199
Implicit rental interest expense		36,696			55,440			59,384			62,116			63,695			16,806
Total Fixed Charges	$	412,193		$	720,924		$	719,641		$	721,025		$	729,103		$	176,180
Ratio of earnings to fixed charges		1.21	x		1.47	x		1.60	x		1.69	x		1.61	x		1.75	X