Fair Value Measurement Disclosures (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Carrying Amount | Significant other observable inputs (Level 2) | Twelve Point Five Percentage Senior Secured Notes Due Two Thousand Seventeen
Estimated fair values of financial instruments
12.5% senior secured notes due 2017	$ 275.0	$ 275.0
Carrying Amount | Significant unobservable inputs (Level 3)
Estimated fair values of financial instruments
Promissory note payable, included in other long- term debt	5.5	5.5
Promissory note payable, included in other long- term debt	2.7	2.7
Carrying Amount | Series B preferred stock | Significant unobservable inputs (Level 3)
Estimated fair values of financial instruments
10 3/4% Series B cumulative exchangeable redeemable preferred stock	129.1	126.6
Fair Value | Significant other observable inputs (Level 2) | Twelve Point Five Percentage Senior Secured Notes Due Two Thousand Seventeen
Estimated fair values of financial instruments
12.5% senior secured notes due 2017	307.3	297.7
Fair Value | Significant unobservable inputs (Level 3)
Estimated fair values of financial instruments
Promissory note payable, included in other long- term debt	4.7	4.5
Promissory note payable, included in other long- term debt	2.7	2.7
Fair Value | Series B preferred stock | Significant unobservable inputs (Level 3)
Estimated fair values of financial instruments
10 3/4% Series B cumulative exchangeable redeemable preferred stock	$ 41.9	$ 37.8