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Long-Term Obligations Senior Secured Notes (Details) (Senior Secured Notes (9.50%), USD $)
In Millions, unless otherwise specified
1 Months Ended 0 Months Ended
Jan. 26, 2012
Senior notes
Dec. 31, 2013
Senior notes
Dec. 31, 2012
Senior notes
Mar. 18, 2011
Senior notes
Mar. 18, 2011
Senior notes
Change of control
Mar. 18, 2011
Senior notes
2013
Mar. 18, 2011
Senior notes
2014
Mar. 18, 2011
Senior notes
2015 and thereafter
Mar. 18, 2011
Line of credit
Debt Instrument [Line Items]                  
Debt instrument, face amount   $ 375.0 $ 375.0 $ 375.0          
Debt instrument, interest rate, stated percentage       9.50%          
Foreign restricted subsidiaries, percent of voting capital stock, collateral                 65.00%
Foreign restricted subsidiaries, percent of non-voting capital stock collateral                 100.00%
Prepayment redemption price percentages         101.00% 107.125% 104.75% 100.00%  
Debt instrument, aggregate principal amount redeemed, percentage 100.00%