Exhibit 12

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

	Quarter
	Ended
	March 31,
	2010			2009			2008			2007			2006			2005
(In thousands)
Earnings from continuing operations before income taxes	$	40,407		$	151,134		$	431,084		$	263,891		$	233,442		$	175,860
Add:
Interest on indebtedness		9,136			35,347			47,011			33,311			29,227			36,234
Amortization of debt expense		272			973			1,070			796			704			939
Portion of rents representative of the interest factor		2,468			10,191			10,823			8,578			7,735			7,392
Deduct:
Undistributed earnings from less-than-50-percent-owned entities		(104	)		(132	)		(66	)		427			(61	)		(631	)
Earnings (as defined)	$	52,179		$	197,513		$	489,922		$	307,003		$	271,047		$	219,794
Fixed charges:
Interest on indebtedness	$	9,136		$	35,347		$	47,011		$	33,311		$	29,227		$	36,234
Amortization of debt expense		272			973			1,070			796			704			939
Portion of rents representative of the interest factor		2,468			10,191			10,823			8,578			7,735			7,392
Total fixed charges	$	11,876		$	46,511		$	58,904		$	42,685		$	37,666		$	44,565
Ratio of earnings to fixed charges		4.4x			4.2	x		8.3	x		7.2	x		7.2	x		4.9x