Long-Term Obligations Senior Secured Notes (Details) (Senior notes, Senior Secured Notes (9.50%), USD $) In Millions, unless otherwise specified	1 Months Ended		0 Months Ended
	Jan. 26, 2012	Mar. 18, 2011	Mar. 18, 2011 Prior to 2013 redemption date	Mar. 18, 2011 2013	Mar. 18, 2011 2014	Mar. 18, 2011 2015 and thereafter	Mar. 18, 2011 Once a year, maximum Prior to 2013 redemption date	Mar. 18, 2011 Proceeds from certain equity offerings Prior to 2013 redemption date	Mar. 18, 2011 Any one or more occassions plus applicable premium Prior to 2013 redemption date	Mar. 18, 2011 Change of control
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		9.50%
Prepayment Redemption Price Percentages				107.125%	104.75%	100.00%				101.00%
Debt Instrument, Aggregate Principal Amount Redeemed, Percenta	100.00%
Debt instrument, face amount		$ 375
Redeemable Aggregate Amount Alternative			$ 37.5
Maximum Redeemable Aggregate Principal Amount Alternative, Percentage							10.00%	35.00%
Redemption Price, Percentage Of Principal Alternative							103.00%	109.50%	100.00%