Debt Including Capital Lease Obligations - 7.875% Senior Secured Notes (Details) (USD $)	9 Months Ended						9 Months Ended	3 Months Ended		9 Months Ended				3 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 7.875% Senior Notes Senior notes	Dec. 31, 2013 7.875% Senior Notes Senior notes	Sep. 30, 2013 7.875% Senior Notes Senior notes	Feb. 28, 2013 7.875% Senior Notes Senior notes	Feb. 05, 2013 7.875% Senior Notes Senior notes	Sep. 30, 2014 7.875% Senior Notes Senior notes Debt Instrument, Redemption, Cash Proceeds from Equity Offerings [Member]	Sep. 30, 2014 7.875% Senior Notes Senior notes Debt Instrument, Redemption, Cash Proceeds from Equity Offerings [Member] Maximum	Sep. 30, 2014 7.875% Senior Notes Senior notes If redeemed during the 12-month period commencing February 1, 2016	Sep. 30, 2014 7.875% Senior Notes Senior notes If redeemed during the 12-month period commencing February 1, 2016	Sep. 30, 2014 7.875% Senior Notes Senior notes If redeemed during the 12-month period commencing February 1, 2017	Sep. 30, 2014 7.875% Senior Notes Senior notes If redeemed during the 12-month period commencing February 1, 2018	Sep. 30, 2014 7.875% Senior Notes Senior notes If redeemed during the 12-month period commencing February 1, 2019	Sep. 30, 2014 7.875% Senior Notes Senior notes Redemption option upon change of control
Debt Instrument [Line Items]
Debt Instrument, Redemption, Description	If redeemed during the 12-month period commencing February 1,
Stated interest rate on debt instrument		7.875%	7.875%	7.875%	7.875%	7.875%
Principal amount of debt component					$ 425,000,000
Debt discount rate					99.274%
Effective interest rate					8.00%
Redemption price percentage							107.90%	0.00%	100.00%	105.90%	103.90%	102.00%	100.00%	100.00%
Debt instrument, Maximum Annual Redemption									$ 42,500,000
Debt instrument, redemption, percentage of principal amount to remain outstanding							100.00%