CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIENCY (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Treasury stock authorized to satisfy minimum statutory tax withholding requirements (shares)	83,582	138,433
Total value	$ 1.2	$ 1.4
Class A Common Stock
Treasury stock authorized to satisfy minimum statutory tax withholding requirements (shares)	0	0
Treasury Stock | Class A Common Stock
Treasury stock authorized to satisfy minimum statutory tax withholding requirements (shares)	83,582	138,433
Weighted average price per share (usd per share)	$ 14.20	$ 10.07
Total value	$ 1.2	$ 1.4