Consolidated Balance Sheets Parenthetical (Parentheticals) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts Receivable, Current	$ 5.4	$ 5.4
Common Class A [Member]
Common Stock, Par Value	$ 0.01	$ 0.01
Common Stock, Shares Authorized	100,000	100,000
Common Stock, Shares, Issued	100,000	100,000
Common Stock, Shares, Outstanding	100,000	100,000
Class B Common Shares [Member]
Common Stock, Par Value	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,900,000	1,900,000
Common Stock, Shares, Issued	914,935	913,063
Common Stock, Shares, Outstanding	914,259	912,706