Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details)

v2.4.0.6
Summary of Significant Accounting Policies (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Summary of Significant Accounting Policies (Textual) [Abstract]          
Interest-bearing instruments with original maturities date of purchase, Maximum     90 days    
Interest-bearing instruments with original maturities date of purchase, Minimum     90 days    
Interest-bearing instruments with remaining maturities date of purchase, Maximum     90 days    
Other revenues $ 0.3   $ 0.7    
Total deferred revenue related to Accrued expenses and Other long-term liabilities 1.4   1.4   0.9
Amount of allowance for doubtful accounts for continuing operations 0.3       0.4
Equity-based compensation expense for continuing operations $ 1.1 $ 1.8 $ 3.3 $ 5.4