Exhibit 12.1

COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES

(in thousands)

	2008		2009		2010		2011		2012		3/31/2012		3/31/2013
Pre-tax income from continuing operations before min. int.		233,892		231,309		253,128		260,783		244,709		51,101		46,440
Equity loss (income)		(229)		(27)		(18)		134		(323)		20		(19)
Fixed charges		76,302		77,076		77,318		76,961		61,554		17,847		13,057
Distributed income of equity investees		-		-		-		-		-		-		-
Less capitalized interest		(13,526)		(1,582)		(3,922)		(1,584)		(1,057)		(497)		(141)
Earnings, as defined		296,439		306,776		326,506		336,294		304,883		68,471		59,337
Interest expense		58,964		71,477		69,146		71,046		56,181		16,197		11,869
Capitalized interest		13,526		1,582		3,922		1,584		1,057		497		141
Amortization of debt & discount/premium		3,812		4,017		4,250		4,331		4,316		1,153		1,047
Fixed charges, as defined		76,302		77,076		77,318		76,961		61,554		17,847		13,057
Ratio of earnings to fixed charges		3.9		4.0		4.2		4.4		5.0		3.8		4.5