Supplemental Guarantor and Non-Guarantor Financial Information (Cash Flow) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	$ (12,899)	$ 35,390
INVESTING ACTIVITIES
Additions to property, plant and equipment	(17,367)	(12,281)
Proceeds from sale of property, plant and equipment	1,329	0
Intercompany loans made		0
Other	356	(151)
Cash flows used in investing activities	(15,682)	(12,432)
FINANCING ACTIVITIES
Proceeds from issuance of debt	0	553,000
Retirements of debt	(3,495)	(409,924)
Dividends paid	0	(626)
Debt issuance costs	0	(20,343)
Advances from (to) consolidated entities	0	0
Intercompany notes borrowings		0
Other	(60)	(166)
Cash flows provided by (used in) financing activities	(3,555)	121,941
Effect of foreign exchange rates on cash	(1,690)	(1,002)
Net increase (decrease) in cash and cash equivalents	(33,826)	143,897
Cash and cash equivalents at beginning of period	468,532	260,818
Cash and cash equivalents at end of period	434,706	404,715
Reportable legal entities | Parent (Issuer)
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	29,810	(100,236)
INVESTING ACTIVITIES
Additions to property, plant and equipment	(360)	(1,421)
Proceeds from sale of property, plant and equipment	0
Intercompany loans made		(2,500)
Other	0	0
Cash flows used in investing activities	(360)	(3,921)
FINANCING ACTIVITIES
Proceeds from issuance of debt		553,000
Retirements of debt	0	(406,566)
Dividends paid		(626)
Debt issuance costs		(20,343)
Advances from (to) consolidated entities	(56,767)	124,182
Intercompany notes borrowings		0
Other	(60)	(119)
Cash flows provided by (used in) financing activities	(56,827)	249,528
Effect of foreign exchange rates on cash	0	0
Net increase (decrease) in cash and cash equivalents	(27,377)	145,371
Cash and cash equivalents at beginning of period	421,533	234,150
Cash and cash equivalents at end of period	394,156	379,521
Reportable legal entities | Guarantor Subsidiaries
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	(35,097)	146,110
INVESTING ACTIVITIES
Additions to property, plant and equipment	(16,195)	(9,117)
Proceeds from sale of property, plant and equipment	1,329
Intercompany loans made		0
Other	0	0
Cash flows used in investing activities	(14,866)	(9,117)
FINANCING ACTIVITIES
Proceeds from issuance of debt		0
Retirements of debt	(1,760)	(1,511)
Dividends paid		0
Debt issuance costs		0
Advances from (to) consolidated entities	50,887	(135,728)
Intercompany notes borrowings		0
Other	0	(47)
Cash flows provided by (used in) financing activities	49,127	(137,286)
Effect of foreign exchange rates on cash	0	0
Net increase (decrease) in cash and cash equivalents	(836)	(293)
Cash and cash equivalents at beginning of period	1,117	1,620
Cash and cash equivalents at end of period	281	1,327
Reportable legal entities | Non-Guarantor Subsidiaries
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	(7,612)	(10,484)
INVESTING ACTIVITIES
Additions to property, plant and equipment	(812)	(1,743)
Proceeds from sale of property, plant and equipment	0
Intercompany loans made		0
Other	356	(151)
Cash flows used in investing activities	(456)	(1,894)
FINANCING ACTIVITIES
Proceeds from issuance of debt		0
Retirements of debt	(1,735)	(1,847)
Dividends paid		0
Debt issuance costs		0
Advances from (to) consolidated entities	5,880	11,546
Intercompany notes borrowings		2,500
Other	0	0
Cash flows provided by (used in) financing activities	4,145	12,199
Effect of foreign exchange rates on cash	(1,690)	(1,002)
Net increase (decrease) in cash and cash equivalents	(5,613)	(1,181)
Cash and cash equivalents at beginning of period	45,882	25,048
Cash and cash equivalents at end of period	40,269	23,867
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		2,500
Other	0	0
Cash flows used in investing activities	0	2,500
FINANCING ACTIVITIES
Proceeds from issuance of debt		0
Retirements of debt	0	0
Dividends paid		0
Debt issuance costs		0
Advances from (to) consolidated entities	0	0
Intercompany notes borrowings		(2,500)
Other	0	0
Cash flows provided by (used in) financing activities	0	(2,500)
Effect of foreign exchange rates on cash	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$ 0	$ 0