GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION Income statement (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net revenues	$ 195,552	$ 117,322	$ 166,834	$ 126,133	$ 216,196	$ 131,081	$ 192,811	$ 140,705	$ 605,841	$ 680,793	$ 633,134
Cost of revenues	116,654	85,832	101,229	98,828	138,125	105,823	125,514	119,579	402,543	489,041	578,570
Selling, general and administrative expenses									107,001	143,616	136,393
Restructuring Charges									1,714	9,856	18,512
Impairment charge (Note 4)									0	0	79,676
Operating (loss) / income	46,528	28,853	36,441	(17,239)	38,298	(8,023)	22,687	(14,682)	94,583	38,280	(180,017)
Interest Expense									(171,444)	(142,005)	(111,709)
Loss on extinguishment of debt									0	(39,203)	(23,115)
Nonoperating Income (Expense)									(25,939)	(9,895)	20,414
Loss before tax									(102,800)	(152,823)	(294,427)
Credit / (provision) for income taxes									515	1,358	17,993
Income / (Loss) From Continuing Operations Before Equity Method Investments And Noncontrolling Interest									(102,285)	(151,465)	(276,434)
Income (Loss) from Equity Method Investments									0	0	0
Loss from continuing operations	1,137	(21,510)	(11,669)	(70,243)	(17,805)	(51,308)	(41,352)	(41,000)	(102,285)	(151,465)	(276,434)
Loss from discontinued operations, net of taxes, before loss on sale									(13,287)	(80,431)	(5,099)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(11,281)	(21,775)	(8,985)	(73,531)	(78,275)	(52,482)	(52,506)	(48,633)	(115,572)	(231,896)	(281,533)
Net Income (Loss) Attributable to Noncontrolling Interest									671	4,468	3,882
Net Income (Loss) Attributable to Parent	$ (11,427)	$ (21,522)	$ (8,678)	$ (73,274)	$ (74,937)	$ (52,138)	$ (52,437)	$ (47,916)	(114,901)	(227,428)	(277,651)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest									(712)	3,505	4,103
Other Comprehensive Income (Loss), Net of Tax									(90,553)	(156,817)	(58,200)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									(206,125)	(388,713)	(339,733)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									(206,837)	(385,208)	(335,630)
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net revenues									0	0	0
Cost of revenues									0	0	0
Selling, general and administrative expenses									18,916	19,026	33,905
Restructuring Charges									0	0	2,422
Impairment charge (Note 4)											0
Operating (loss) / income									(18,916)	(19,026)	(36,327)
Interest Expense									(174,257)	(138,480)	(88,102)
Loss on extinguishment of debt										(24,161)	(23,115)
Nonoperating Income (Expense)									97,480	144,257	167,318
Loss before tax									(95,693)	(37,410)	19,774
Credit / (provision) for income taxes									0	0	0
Income / (Loss) From Continuing Operations Before Equity Method Investments And Noncontrolling Interest									(95,693)	(37,410)	19,774
Income (Loss) from Equity Method Investments									(19,208)	(190,018)	(297,425)
Loss from continuing operations									(114,901)	(227,428)	(277,651)
Loss from discontinued operations, net of taxes, before loss on sale									0	0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									(114,901)	(227,428)	(277,651)
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	0
Net Income (Loss) Attributable to Parent									(114,901)	(227,428)	(277,651)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest									0	0	0
Other Comprehensive Income (Loss), Net of Tax									(91,936)	(157,780)	(57,979)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									(206,837)	(385,208)	(335,630)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									(206,837)	(385,208)	(335,630)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net revenues									0	0	0
Cost of revenues									0	0	0
Selling, general and administrative expenses									485	804	5
Restructuring Charges									0	0	24
Impairment charge (Note 4)											0
Operating (loss) / income									(485)	(804)	(29)
Interest Expense									(106,821)	(137,891)	(124,100)
Loss on extinguishment of debt										0	0
Nonoperating Income (Expense)									(19,627)	21,778	15,449
Loss before tax									(126,933)	(116,917)	(108,680)
Credit / (provision) for income taxes									16,007	12,170	9,510
Income / (Loss) From Continuing Operations Before Equity Method Investments And Noncontrolling Interest									(110,926)	(104,747)	(99,170)
Income (Loss) from Equity Method Investments									92,772	(85,271)	(198,255)
Loss from continuing operations									(18,154)	(190,018)	(297,425)
Loss from discontinued operations, net of taxes, before loss on sale									(1,054)	0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									(19,208)	(190,018)	(297,425)
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	0
Net Income (Loss) Attributable to Parent									(19,208)	(190,018)	(297,425)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest									0	0	0
Other Comprehensive Income (Loss), Net of Tax									13,065	(315,291)	(74,385)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									(6,143)	(505,309)	(371,810)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									(6,143)	(505,309)	(371,810)
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net revenues									605,841	680,793	633,134
Cost of revenues									402,543	489,041	578,570
Selling, general and administrative expenses									87,600	123,786	102,483
Restructuring Charges									1,714	9,856	16,066
Impairment charge (Note 4)											79,676
Operating (loss) / income									113,984	58,110	(143,661)
Interest Expense									(15,307)	(31,226)	(43,537)
Loss on extinguishment of debt										(15,042)	0
Nonoperating Income (Expense)									21,149	(10,338)	(18,323)
Loss before tax									119,826	1,504	(205,521)
Credit / (provision) for income taxes									(15,492)	(10,812)	8,483
Income / (Loss) From Continuing Operations Before Equity Method Investments And Noncontrolling Interest									104,334	(9,308)	(197,038)
Income (Loss) from Equity Method Investments									0	0	0
Loss from continuing operations									104,334	(9,308)	(197,038)
Loss from discontinued operations, net of taxes, before loss on sale									(12,233)	(80,431)	(5,099)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									92,101	(89,739)	(202,137)
Net Income (Loss) Attributable to Noncontrolling Interest									671	4,468	3,882
Net Income (Loss) Attributable to Parent									92,772	(85,271)	(198,255)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest									(712)	3,505	4,103
Other Comprehensive Income (Loss), Net of Tax									(139,966)	(150,841)	(5,428)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									(47,865)	(240,580)	(207,565)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									(48,577)	(237,075)	(203,462)
Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net revenues									0	0	0
Cost of revenues									0	0	0
Selling, general and administrative expenses									0	0	0
Restructuring Charges									0	0	0
Impairment charge (Note 4)											0
Operating (loss) / income									0	0	0
Interest Expense									124,941	165,592	144,030
Loss on extinguishment of debt										0	0
Nonoperating Income (Expense)									(124,941)	(165,592)	(144,030)
Loss before tax									0	0	0
Credit / (provision) for income taxes									0	0	0
Income / (Loss) From Continuing Operations Before Equity Method Investments And Noncontrolling Interest									0	0	0
Income (Loss) from Equity Method Investments									(73,564)	275,289	495,680
Loss from continuing operations									(73,564)	275,289	495,680
Loss from discontinued operations, net of taxes, before loss on sale									0	0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									(73,564)	275,289	495,680
Net Income (Loss) Attributable to Noncontrolling Interest									0	0	0
Net Income (Loss) Attributable to Parent									(73,564)	275,289	495,680
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest									0	0	0
Other Comprehensive Income (Loss), Net of Tax									128,284	467,095	79,592
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									54,720	742,384	575,272
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									$ 54,720	$ 742,384	$ 575,272