Consolidated Statements Of Changes In Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Comprehensive Income (Loss) [Member]	Total
Beginning Balance at Dec. 31, 2008	$ 41,995	$ 268,263	$ 1,182,906	$ (108,202)	$ (138,507)	$ 39,428		$ 1,285,883
Beginning Balance, Shares at Dec. 31, 2008	41,995				2,311
Net income			302,994			11,017	314,011	314,011
Cash dividends ($1.36, $1.36, $1.36 per share) during 2009, 2010, 2011 respectively			(54,022)					(54,022)
Financial instruments marked to market, net of tax of $8,028, $1,188, $4,996 during 2009, 2010, 2011 respectively				15,988			15,988	15,988
Cumulative translation adjustment, net of tax of $1,385, $(1,910), $(161) during 2009, 2010 and 2011, respectively				49,798		109	49,907	49,907
Pension liability adjustment, net of tax of $967, $(582), and $(27,492) during 2009, 2010 and 2011 respectively				8,296			8,296	8,296
Distributions to noncontrolling interest shareholders						(702)		(702)
Disposition of noncontrolling interest						(45,019)		(45,019)
Comprehensive income							388,202
Shares issued under compensation plans	38	8,787			1,564			10,389
Shares issued under compensation plans, Shares	(38)				(24)
Deferred compensation					343			343
Deferred compensation, Shares					(9)
Ending Balance at Dec. 31, 2009	42,033	277,050	1,431,878	(34,120)	(136,600)	4,833		1,585,074
Ending Balance, Shares at Dec. 31, 2009	42,033				2,278
Net income			201,094			1,361	202,455	202,455
Cash dividends ($1.36, $1.36, $1.36 per share) during 2009, 2010, 2011 respectively			(54,312)					(54,312)
Financial instruments marked to market, net of tax of $8,028, $1,188, $4,996 during 2009, 2010, 2011 respectively				2,081			2,081	2,081
Cumulative translation adjustment, net of tax of $1,385, $(1,910), $(161) during 2009, 2010 and 2011, respectively				(18,449)		47	(18,402)	(18,402)
Pension liability adjustment, net of tax of $967, $(582), and $(27,492) during 2009, 2010 and 2011 respectively				(1,392)			(1,392)	(1,392)
Convertible debt discount, net of tax of $29,532		51,702						51,702
Call options, net of tax of $(32,293)		(58,602)						(58,602)
Warrants		60,775						60,775
Distributions to noncontrolling interest shareholders						(1,974)		(1,974)
Deconsolidation of VIE			253			(365)		(112)
Comprehensive income							184,742
Shares issued under compensation plans	212	18,231			1,302			19,745
Shares issued under compensation plans, Shares	(212)				(22)
Deferred compensation					240			240
Deferred compensation, Shares					(6)
Ending Balance at Dec. 31, 2010	42,245	349,156	1,578,913	(51,880)	(135,058)	3,902		1,787,278
Ending Balance, Shares at Dec. 31, 2010	42,245				2,250
Net income			323,329			1,638	324,967	324,967
Cash dividends ($1.36, $1.36, $1.36 per share) during 2009, 2010, 2011 respectively			(55,136)					(55,136)
Financial instruments marked to market, net of tax of $8,028, $1,188, $4,996 during 2009, 2010, 2011 respectively				8,005			8,005	8,005
Cumulative translation adjustment, net of tax of $1,385, $(1,910), $(161) during 2009, 2010 and 2011, respectively				(13,026)		(397)	(13,423)	(13,423)
Pension liability adjustment, net of tax of $967, $(582), and $(27,492) during 2009, 2010 and 2011 respectively				(47,878)			(47,878)	(47,878)
Divestiture of businesses, net of tax of $4,864				(54,574)			(54,574)	(54,574)
Distributions to noncontrolling interest shareholders						(118)		(118)
Disposition of noncontrolling interest						(2,830)		(2,830)
Comprehensive income							217,097
Shares issued under compensation plans	678	31,848			3,829			36,355
Shares issued under compensation plans, Shares	(678)				(63)
Deferred compensation		(39)			176			137
Deferred compensation, Shares					(4)
Ending Balance at Dec. 31, 2011	$ 42,923	$ 380,965	$ 1,847,106	$ (159,353)	$ (131,053)	$ 2,195		$ 1,982,783
Ending Balance, Shares at Dec. 31, 2011	42,923				2,183