Consolidating Financial Information - Additional Information (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended 12 Months Ended
May 02, 2013
Dec. 31, 2014
May 02, 2014
Dec. 31, 2013
May 02, 2013
Debt Instrument [Line Items]          
Percentage of ownership interest   100.00%      
8.25% Second Priority Senior Secured Obligations Due 2020          
Debt Instrument [Line Items]          
Debt outstanding   $ 355.0 $ 355.0 $ 355.0  
Interest rate (as a percent) 8.25%       8.25%
Debt maturity date Jan. 01, 2020 Jan. 01, 2020