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Fixed Assets and Lease Commitments (Tables)
12 Months Ended
Dec. 31, 2012
Fixed Assets and Lease Commitments  
Schedule of fixed assets

 

 
  December 31,
 
 
  2011   2012  

Building and leasehold improvements

  $ 59.1   $ 74.7  

Office equipment

    34.1     38.9  

Furniture and fixtures

    20.6     16.3  

Land and improvements

    17.9     18.1  

Computer software

    20.5     21.4  
           

Fixed assets, at cost

    152.2     169.4  

Accumulated depreciation and amortization

    (83.1 )   (87.9 )
           

Fixed assets, net

  $ 69.1   $ 81.5  
           
Schedule of aggregate future minimum payments for operating leases

 

 
  Required Minimum
Payments
 

2013

  $ 26.9  

2014

    26.4  

2015

    24.0  

2016

    18.3  

2017

    16.3  

Thereafter

    64.0