We have computed the ratio of earnings to fixed charges for each of the following periods on a consolidated basis. For purposes of computing the ratio of earnings to fixed charges, "earnings" consist of pretax income from continuing operations plus fixed charges (excluding capitalized interest). "Fixed charges" represent interest incurred (whether expensed or capitalized), amortization of debt expense, and that portion of rental expense on operating leases deemed to be the equivalent of interest. We have determined that one-fourth of our rental expense represents a reasonable approximation of the interest portion of rental expense. You should read the ratio of earnings to fixed charges in conjunction with our consolidated and condensed financial statements that are incorporated by reference in this prospectus.

	Year Ended December 31,											Six Months Ended June 30

	2008		2009		2010		2011		2012			2012		2013
												unaudited
Earnings
Earnings (loss) before income taxes		221,342		270,370		274,757		256,550		287,249			154,044		139,339
Plus: Fixed charges		120,191		81,541		82,241		94,816		92,446			46,828		48,785
Less: Capitalized interest expense(1)		—		—		—		—		(1,475	)		—		(998	)

Total		341,533		351,911		356,998		351,366		378,220			200,872		187,126
Fixed Charges
Interest expense		66,241		26,791		26,766		37,234		32,065			17,320		17,857
Capitalized interest expense(1)		—		—		—		—		1,475			—		998
Estimate of interest portion of rental expense		53,950		54,750		55,475		57,582		58,906			29,508		29,930

Total		120,191		81,541		82,241		94,816		92,446			46,828		48,785
Ratio of Earnings to Fixed Charges		2.84x		4.32x		4.34x		3.71x		4.09x			4.29x		3.84x