Supplemental Guarantor and Non-Guarantor Financial Information (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	$ (19,398)	$ 70,854
INVESTING ACTIVITIES
Additions to property, plant and equipment	(34,027)	(120,845)
Proceeds from sales of investments		12,228
Other	1,021	(85)
Cash flows used in investing activities	(33,006)	(108,702)
FINANCING ACTIVITIES
Proceeds from issuance of debt	450,000
Borrowings under revolving credit agreement	320,778	135,294
Repayments on revolving credit agreement	(320,778)	(70,156)
Retirements of debt	(254,687)	(9,177)
Dividends paid	(7,816)	(7,806)
Excess tax benefits deficit from stock-based compensation arrangements	(372)	783
Proceeds from stock options exercised	279	120
Debt issuance costs	(15,163)
Other	(235)	(1,527)
Cash flows provided by financing activities	172,006	47,531
Net increase in cash and cash equivalents	119,190	9,770
Effect of foreign exchange rates on cash	(412)	87
Net increase (decrease) in cash and cash equivalents	119,190	9,770
Cash and cash equivalents at beginning of period	116,601	128,430
Cash and cash equivalents at end of period	235,791	138,200
Parent (Issuer)
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	(28,029)	(57,822)
INVESTING ACTIVITIES
Additions to property, plant and equipment	(314)	(630)
Intercompany notes issued	(45,591)	(11,101)
Intercompany notes proceeds	22,000
Investments in subsidiaries	(50,103)
Cash flows used in investing activities	(74,008)	(11,731)
FINANCING ACTIVITIES
Proceeds from issuance of debt	450,000
Retirements of debt	(250,000)
Dividends paid	(7,816)	(7,806)
Excess tax benefits deficit from stock-based compensation arrangements	(195)	783
Proceeds from stock options exercised	279	120
Debt issuance costs	15,163
Advances from (to) consolidated entities	41,521	104,534
Other	(237)	(647)
Cash flows provided by financing activities	218,389	96,984
Net increase (decrease) in cash and cash equivalents	116,352	27,431
Cash and cash equivalents at beginning of period	83,833	99,086
Cash and cash equivalents at end of period	200,185	126,517
Guarantor Subsidiaries
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	65,848	145,851
INVESTING ACTIVITIES
Additions to property, plant and equipment	(24,545)	(31,461)
Other		(85)
Cash flows used in investing activities	(24,545)	(31,546)
FINANCING ACTIVITIES
Retirements of debt	(2,588)	(1,983)
Excess tax benefits deficit from stock-based compensation arrangements	(177)
Advances from (to) consolidated entities	(38,443)	(112,293)
Other	2	1
Cash flows provided by financing activities	(41,206)	(114,275)
Net increase (decrease) in cash and cash equivalents	97	30
Cash and cash equivalents at beginning of period	61	79
Cash and cash equivalents at end of period	158	109
Non-Guarantor Subsidiaries
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	(57,217)	(17,175)
INVESTING ACTIVITIES
Additions to property, plant and equipment	9,168	(88,754)
Proceeds from sales of investments		12,228
Other	1,021
Cash flows used in investing activities	(8,147)	(76,526)
FINANCING ACTIVITIES
Borrowings under revolving credit agreement	320,778	135,294
Repayments on revolving credit agreement	(320,778)	(70,156)
Retirements of debt	(2,099)	(7,194)
Advances from (to) consolidated entities	(3,078)	7,759
Intercompany notes borrowings	45,591	11,101
Intercompany notes payments	(22,000)
Investment from Parent	(50,103)
Other		(881)
Cash flows provided by financing activities	68,517	75,923
Effect of foreign exchange rates on cash	(412)	87
Net increase (decrease) in cash and cash equivalents	2,741	(17,691)
Cash and cash equivalents at beginning of period	32,707	29,265
Cash and cash equivalents at end of period	35,448	11,574
Eliminations
INVESTING ACTIVITIES
Intercompany notes issued	45,591	11,101
Intercompany notes proceeds	(22,000)
Investments in subsidiaries	50,103
Cash flows used in investing activities	73,694	11,101
FINANCING ACTIVITIES
Intercompany notes borrowings	(45,591)	(11,101)
Intercompany notes payments	22,000
Investment from Parent	(50,103)
Cash flows provided by financing activities	$ (73,694)	$ (11,101)