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Business Combinations and Consolidation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended
Sep. 30, 2012
Mango Moving, LLC (Formerly Build My Move, LLC) [Member]
Dec. 31, 2011
Mango Moving, LLC (Formerly Build My Move, LLC) [Member]
Oct. 17, 2011
Mango Moving, LLC (Formerly Build My Move, LLC) [Member]
Mar. 08, 2012
StreetLinks LLC [Member]
Sep. 30, 2012
StreetLinks LLC [Member]
Mar. 31, 2012
StreetLinks LLC [Member]
Dec. 31, 2011
StreetLinks LLC [Member]
Nov. 10, 2011
StreetLinks LLC [Member]
Nov. 10, 2011
StreetLinks LLC [Member]
Corvisa, LLC [Member]
Sep. 30, 2012
StreetLinks LLC [Member]
Corvisa, LLC [Member]
Contingent Consideration [Member]
Dec. 31, 2011
StreetLinks LLC [Member]
Corvisa, LLC [Member]
Contingent Consideration [Member]
Nov. 10, 2011
StreetLinks LLC [Member]
Corvisa, LLC [Member]
Contingent Consideration [Member]
Sep. 30, 2012
StreetLinks LLC [Member]
March 8, 2012 [Member]
Sep. 30, 2012
StreetLinks LLC [Member]
June 30, 2012 [Member]
Sep. 30, 2012
StreetLinks LLC [Member]
September 30, 2012 [Member]
Sep. 30, 2012
StreetLinks LLC [Member]
Last Day of Each Quarter Until March 8, 2016 [Member]
Sep. 30, 2012
StreetLinks LLC [Member]
March 8, 2016 [Member]
Sep. 30, 2012
StreetLinks LLC [Member]
Unit Purchase Agreement [Member]
Business Acquisition [Line Items]                                    
Membership units       1,927                            
Ownership percentage increase       5.00%                            
Purchase price                 $ 0.5       $ 0.5 $ 0.5 $ 0.3 $ 0.3 $ 1.6 $ 6.1
Interest rate         4.00%                          
Ownership percentage, by parent         91.00% 93.00% 88.00%                      
Equity ownership interest acquired     51.00%           49.00%                  
Purchase price     1.7                              
Future obligations to make additional capital contributions     0.7                              
Contingent consideration 0.3 0.3 0.3             0.9 0.9 1.2            
Ownership percentage                 100.00%                  
Cash payment due one year from exchange date               0.5                    
Accrual for loss contingency, current 0.2 0.2               0.4                
Accrual for loss contingency, noncurrent $ 0.1 $ 0.1               $ 0.5