Supplemental Guarantor and Non-Guarantor Financial Information (Cash Flow) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	$ (147,130)	$ (39,008)
INVESTING ACTIVITIES
Additions to property, plant and equipment	(48,332)	(43,476)
Proceeds from sale of property, plant and equipment	1,706	0
Intercompany loans made		0
Intercompany loans received		0
Other	589	(350)
Cash flows used in investing activities	(46,037)	(43,826)
FINANCING ACTIVITIES
Proceeds from issuance of debt	0	553,000
Retirements of debt	(7,048)	(414,124)
Dividends paid	0	(1,284)
Debt issuance costs	0	(21,325)
Advances from (to) consolidated entities	0	0
Intercompany notes borrowings		0
Intercompany notes payments		0
Other	(60)	(191)
Cash flows provided by (used in) financing activities	(7,108)	116,076
Effect of foreign exchange rates on cash	(1,254)	(588)
Net increase (decrease) in cash and cash equivalents	(201,529)	32,654
Cash and cash equivalents at beginning of period	468,532	260,818
Cash and cash equivalents at beginning of period	267,003	293,472
Reportable legal entities | Parent (Issuer)
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	22,008	(112,535)
INVESTING ACTIVITIES
Additions to property, plant and equipment	(598)	(1,691)
Proceeds from sale of property, plant and equipment	0
Intercompany loans made		(3,700)
Intercompany loans received		1,828
Other	0	0
Cash flows used in investing activities	(598)	(3,563)
FINANCING ACTIVITIES
Proceeds from issuance of debt		553,000
Retirements of debt	0	(406,566)
Dividends paid		(1,284)
Debt issuance costs		(21,325)
Advances from (to) consolidated entities	(212,543)	13,934
Intercompany notes borrowings		0
Intercompany notes payments		0
Other	(60)	(191)
Cash flows provided by (used in) financing activities	(212,603)	137,568
Effect of foreign exchange rates on cash	0	0
Net increase (decrease) in cash and cash equivalents	(191,193)	21,470
Cash and cash equivalents at beginning of period	421,533	234,150
Cash and cash equivalents at beginning of period	230,340	255,620
Reportable legal entities | Guarantor Subsidiaries
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	(151,526)	98,093
INVESTING ACTIVITIES
Additions to property, plant and equipment	(44,984)	(37,459)
Proceeds from sale of property, plant and equipment	1,454
Intercompany loans made		0
Intercompany loans received		0
Other	0	0
Cash flows used in investing activities	(43,530)	(37,459)
FINANCING ACTIVITIES
Proceeds from issuance of debt		0
Retirements of debt	(3,550)	(3,685)
Dividends paid		0
Debt issuance costs		0
Advances from (to) consolidated entities	197,489	(53,903)
Intercompany notes borrowings		0
Intercompany notes payments		0
Other	0	0
Cash flows provided by (used in) financing activities	193,939	(57,588)
Effect of foreign exchange rates on cash	0	0
Net increase (decrease) in cash and cash equivalents	(1,117)	3,046
Cash and cash equivalents at beginning of period	1,117	1,620
Cash and cash equivalents at beginning of period	0	4,666
Reportable legal entities | Non-Guarantor Subsidiaries
Supplemental guarantor and non-guarantor financial information
Cash flows provided by (used in) operating activities	(17,612)	(24,566)
INVESTING ACTIVITIES
Additions to property, plant and equipment	(2,750)	(4,326)
Proceeds from sale of property, plant and equipment	252
Intercompany loans made		0
Intercompany loans received		0
Other	589	(350)
Cash flows used in investing activities	(1,909)	(4,676)
FINANCING ACTIVITIES
Proceeds from issuance of debt		0
Retirements of debt	(3,498)	(3,873)
Dividends paid		0
Debt issuance costs		0
Advances from (to) consolidated entities	15,054	39,969
Intercompany notes borrowings		3,700
Intercompany notes payments		(1,828)
Other	0	0
Cash flows provided by (used in) financing activities	11,556	37,968
Effect of foreign exchange rates on cash	(1,254)	(588)
Net increase (decrease) in cash and cash equivalents	(9,219)	8,138
Cash and cash equivalents at beginning of period	45,882	25,048
Cash and cash equivalents at beginning of period	36,663	33,186
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		3,700
Intercompany loans received		(1,828)
Other	0	0
Cash flows used in investing activities	0	1,872
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		(3,700)
Intercompany notes payments		1,828
Other	0	0
Cash flows provided by (used in) financing activities	0	(1,872)
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 beginning of period	$ 0	$ 0