Supplemental Guarantor and Non-Guarantor Financial Information (Cash Flow) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	$ (20,786)	$ (44,026)
INVESTING ACTIVITIES
Additions to property, plant and equipment	(69,733)	(108,735)
Proceeds from sale of property, plant and equipment	24,112	0
Intercompany loans made	0	0
Intercompany loans received	0	0
Investments in subsidiaries		0
Other	134	663
Cash flows used in investing activities	(45,487)	(106,513)
Proceeds from sale of investments	0	1,559
FINANCING ACTIVITIES
Proceeds from issuance of debt	869,800	897,412
Retirements of debt	(418,321)	(510,255)
Dividends paid	(1,944)	(16,264)
Debt issuance costs	(27,748)	(42,128)
Advances from (to) consolidated entities	0	0
Intercompany notes borrowings	0	0
Intercompany notes payments	0	0
Other	(195)	(732)
Cash flows provided by financing activities	421,592	328,033
Effect of foreign exchange rates on cash	(1,514)	(961)
Net increase in cash and cash equivalents	353,805	176,533
Cash and cash equivalents at beginning of period	260,818	116,601
Cash and cash equivalents at beginning of period	614,623	293,134
Reportable legal entities | Parent (Issuer)
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	(124,771)	(165,441)
INVESTING ACTIVITIES
Additions to property, plant and equipment	(2,758)	(863)
Proceeds from sale of property, plant and equipment	0
Intercompany loans made	(5,200)	(33,100)
Intercompany loans received	1,828	30,500
Investments in subsidiaries		0
Other	0	0
Cash flows used in investing activities	(6,130)	(3,463)
Proceeds from sale of investments		0
FINANCING ACTIVITIES
Proceeds from issuance of debt	869,800	897,412
Retirements of debt	(406,566)	(496,062)
Dividends paid	(1,944)	(16,264)
Debt issuance costs	(27,748)	(42,128)
Advances from (to) consolidated entities	30,043	4,729
Intercompany notes borrowings	0	0
Intercompany notes payments	0	0
Other	(195)	(883)
Cash flows provided by financing activities	463,390	346,804
Effect of foreign exchange rates on cash	0	0
Net increase in cash and cash equivalents	332,489	177,900
Cash and cash equivalents at beginning of period	234,150	83,833
Cash and cash equivalents at beginning of period	566,639	261,733
Reportable legal entities | Guarantor Subsidiaries
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	115,279	163,367
INVESTING ACTIVITIES
Additions to property, plant and equipment	(60,059)	(84,623)
Proceeds from sale of property, plant and equipment	24,112
Intercompany loans made	0	0
Intercompany loans received	0	0
Investments in subsidiaries		0
Other	0	0
Cash flows used in investing activities	(35,947)	(84,623)
Proceeds from sale of investments		0
FINANCING ACTIVITIES
Proceeds from issuance of debt	0	0
Retirements of debt	(5,790)	(14,193)
Dividends paid	0	0
Debt issuance costs	0	0
Advances from (to) consolidated entities	(73,573)	(64,763)
Intercompany notes borrowings	0	0
Intercompany notes payments	0	0
Other	0	151
Cash flows provided by financing activities	(79,363)	(78,805)
Effect of foreign exchange rates on cash	0	0
Net increase in cash and cash equivalents	(31)	(61)
Cash and cash equivalents at beginning of period	101	61
Cash and cash equivalents at beginning of period	70	0
Reportable legal entities | Non-Guarantor Subsidiaries
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	(11,294)	(41,952)
INVESTING ACTIVITIES
Additions to property, plant and equipment	(6,916)	(23,249)
Proceeds from sale of property, plant and equipment	0
Intercompany loans made	0	0
Intercompany loans received	0	0
Investments in subsidiaries		0
Other	134	663
Cash flows used in investing activities	(6,782)	(21,027)
Proceeds from sale of investments		1,559
FINANCING ACTIVITIES
Proceeds from issuance of debt	0	0
Retirements of debt	(5,965)	0
Dividends paid	0	0
Debt issuance costs	0	0
Advances from (to) consolidated entities	43,530	60,034
Intercompany notes borrowings	5,200	33,100
Intercompany notes payments	(1,828)	(30,500)
Other	0	0
Cash flows provided by financing activities	40,937	62,634
Effect of foreign exchange rates on cash	(1,514)	(961)
Net increase in cash and cash equivalents	21,347	(1,306)
Cash and cash equivalents at beginning of period	26,567	32,707
Cash and cash equivalents at beginning of period	47,914	31,401
Eliminations
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	0	0
INVESTING ACTIVITIES
Additions to property, plant and equipment	0	0
Proceeds from sale of property, plant and equipment	0
Intercompany loans made	5,200	33,100
Intercompany loans received	(1,828)	(30,500)
Investments in subsidiaries		0
Other	0	0
Cash flows used in investing activities	3,372	2,600
Proceeds from sale of investments		0
FINANCING ACTIVITIES
Proceeds from issuance of debt	0	0
Retirements of debt	0	0
Dividends paid	0	0
Debt issuance costs	0	0
Advances from (to) consolidated entities	0	0
Intercompany notes borrowings	(5,200)	(33,100)
Intercompany notes payments	1,828	30,500
Other	0	0
Cash flows provided by financing activities	(3,372)	(2,600)
Effect of foreign exchange rates on cash	0	0
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at beginning of period	$ 0	$ 0