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Condensed Consolidating Financial Information (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	May. 21, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Assets	$ 4,419,473		$ 4,419,473			$ 4,478,924
Net income (loss)	$ (6,425)	$ 5,338	28,678	$ (5,887)
Net cash from operating activities			$ 155,776	138,329
Senior Notes | 9.00% Senior Notes Due 2020
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	9.00%		9.00%
Parent
Debt Instrument [Line Items]
Assets	$ 3,596,790		$ 3,596,790			$ 3,457,936
Net income (loss)		669		(5,513)
Net cash from operating activities			$ (40,933)	(33,921)
Parent | Senior Notes | 9.125% Senior Notes Due 2018
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	9.125%		9.125%			9.125%
Parent | Senior Notes | 9.00% Senior Notes Due 2020
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	9.00%		9.00%			9.00%
Parent | Senior Notes | 6.875 % Senior Notes Due 2023
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.875%		6.875%		6.875%
Guarantor Subsidiaries
Debt Instrument [Line Items]
Assets	$ 4,489,814		$ 4,489,814			$ 4,390,771
Net income (loss)		42,551		78,716
Net cash from operating activities			150,591	125,168
Non-Guarantor Subsidiaries (100% Owned)
Debt Instrument [Line Items]
Assets	1,511,438		1,511,438			1,545,428
Net income (loss)		(11,725)		(21,765)
Net cash from operating activities			36,811	38,377
Non-Guarantor Subsidiaries (Not 100% Owned)
Debt Instrument [Line Items]
Assets	219		219			219
Net income (loss)		9,308		(861)
Net cash from operating activities			(70)	12,118
Eliminations
Debt Instrument [Line Items]
Assets	$ (5,178,788)		(5,178,788)			$ (4,915,430)
Net income (loss)		$ (35,465)		(56,464)
Net cash from operating activities			$ 9,377	$ (3,413)

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