EXHIBIT 12

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(Dollars in thousands, except ratio amounts)

	Three Months Ended
	March 31,					Years Ended December 31,
	2010			2009		2009			2008			2007		2006		2005
Income (loss) from continuing operations before tax	$	74,509		$	17,358	$	(94,230	)	$	439,587		$	264,656	$	208,633	$	308,197
Share of undistributed (losses) income from 50%-or-less-owned affiliates, excluding affiliates with guaranteed debt		(349	)		623		907			(1,418	)		1,321		5,696		4,762
Amortization of capitalized interest		505			481		4,096			1,839			1,406		1,229		1,204
Interest expense		9,558			8,429		41,883			44,401			42,314		49,037		51,299
Interest portion of rental expense		2,118			2,155		8,527			8,687			7,516		4,950		3,384
Earnings (loss)	$	86,341		$	29,046	$	(38,817	)	$	493,096		$	317,213	$	269,545	$	368,846
Interest	$	9,585		$	9,292	$	43,660		$	47,354		$	48,014	$	52,318	$	51,919
Interest portion of rental expense		2,118			2,155		8,527			8,687			7,516		4,950		3,384
Fixed Charges	$	11,703		$	11,447	$	52,187		$	56,041		$	55,530	$	57,268	$	55,303
Ratio of Earnings to Fixed Charges		7.38			2.54		(0.74	)		8.80			5.71		4.71		6.67