Supplemental Guarantor and Non-Guarantor Financial Information (Details 5) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	$ (44,026)	$ 333,006
INVESTING ACTIVITIES
Additions to property, plant and equipment	(108,735)	(331,340)
Proceeds from sales of investments	1,559	12,382
Other	663	1,076
Cash flows used in investing activities	(106,513)	(317,882)
FINANCING ACTIVITIES
Proceeds from issuance of debt	897,412
Borrowings under revolving credit agreement	646,320	272,926
Repayments on revolving credit agreement	(646,320)	(125,396)
Retirements of debt	(510,255)	(128,450)
Dividends paid	(16,264)	(23,432)
Net consideration paid upon exercise of warrants		(11,535)
Debt issuance costs	(42,128)	(6,376)
Other	(732)	178
Cash flows provided by (used in) financing activities	328,033	(22,085)
Cash flows provided by (used in) continuing operations	177,494	(6,961)
CASH FLOWS FROM DISCONTINUED OPERATIONS		9,500
Effect of foreign exchange rates on cash	(961)	(1,047)
Net increase (decrease) in cash and cash equivalents	176,533	1,492
Cash and cash equivalents at beginning of period	116,601	128,430
Cash and cash equivalents at end of period	293,134	129,922
Parent (Issuer)
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	(165,441)	(141,991)
INVESTING ACTIVITIES
Additions to property, plant and equipment	(863)	(4,127)
Intercompany loans made	(33,100)	(58,102)
Intercompany payments received	30,500
Cash flows used in investing activities	(3,463)	(62,229)
FINANCING ACTIVITIES
Proceeds from issuance of debt	897,412
Retirements of debt	(496,062)	(100,000)
Dividends paid	(16,264)	(23,432)
Net consideration paid upon exercise of warrants		(11,535)
Debt issuance costs	(42,128)	(6,376)
Advances from (to) consolidated entities	4,729	357,707
Other	(883)	176
Cash flows provided by (used in) financing activities	346,804	216,540
Cash flows provided by (used in) continuing operations		12,320
Net increase (decrease) in cash and cash equivalents	177,900	12,320
Cash and cash equivalents at beginning of period	83,833	99,086
Cash and cash equivalents at end of period	261,733	111,406
Guarantor Subsidiaries
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	163,367	360,669
INVESTING ACTIVITIES
Additions to property, plant and equipment	(84,623)	(108,002)
Other		1,076
Cash flows used in investing activities	(84,623)	(106,926)
FINANCING ACTIVITIES
Retirements of debt	(14,193)	(6,056)
Advances from (to) consolidated entities	(64,763)	(257,147)
Other	151	2
Cash flows provided by (used in) financing activities	(78,805)	(263,201)
Cash flows provided by (used in) continuing operations		(9,458)
CASH FLOWS FROM DISCONTINUED OPERATIONS		9,500
Net increase (decrease) in cash and cash equivalents	(61)	42
Cash and cash equivalents at beginning of period	61	79
Cash and cash equivalents at end of period		121
Non-Guarantor Subsidiaries
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	(41,952)	114,328
INVESTING ACTIVITIES
Additions to property, plant and equipment	(23,249)	(219,211)
Proceeds from sales of investments	1,559	12,382
Other	663
Cash flows used in investing activities	(21,027)	(206,829)
FINANCING ACTIVITIES
Borrowings under revolving credit agreement	646,320	272,926
Repayments on revolving credit agreement	(646,320)	(125,396)
Retirements of debt		(22,394)
Advances from (to) consolidated entities	60,034	(100,560)
Intercompany borrowings	33,100	58,102
Intercompany payments made	(30,500)
Cash flows provided by (used in) financing activities	62,634	82,678
Cash flows provided by (used in) continuing operations		(9,823)
Effect of foreign exchange rates on cash	(961)	(1,047)
Net increase (decrease) in cash and cash equivalents	(1,306)	(10,870)
Cash and cash equivalents at beginning of period	32,707	29,265
Cash and cash equivalents at end of period	31,401	18,395
Eliminations
INVESTING ACTIVITIES
Intercompany loans made	33,100	58,102
Intercompany payments received	(30,500)
Cash flows used in investing activities	2,600	58,102
FINANCING ACTIVITIES
Intercompany borrowings	(33,100)	(58,102)
Intercompany payments made	30,500
Cash flows provided by (used in) financing activities	$ (2,600)	$ (58,102)