v2.4.0.6
Related Party (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Related Party [Abstract]    
Purchased of services and assets $ 0.6  
Outstanding balance of capital leases 0.2  
Loan to owned joint venture   $ 3.0
Ownership interest in Middlebury Interactive Language joint venture   60.00%