XML 23 R31.htm IDEA: XBRL DOCUMENT v2.4.0.6
Goodwill (Schedule Of Goodwill) (Detail) (USD $)
 9 Months Ended 11 Months Ended
Sep. 30, 2012
Nov. 30, 2011
Goodwill [Line Items]    
Goodwill impairment   $ 0
Balance as of January 1, 2012 1,323,469,000  
Goodwill of acquired businesses 364,025,000  
Goodwill disposed of relating to sales of businesses (1,034,000)  
Balance as of September 30, 2012 1,686,460,000  
Retail [Member]
    
Goodwill [Line Items]    
Balance as of January 1, 2012 823,573,000  
Goodwill of acquired businesses 27,045,000  
Goodwill disposed of relating to sales of businesses (1,034,000)  
Balance as of September 30, 2012 849,584,000  
National Programs [Member]
    
Goodwill [Line Items]    
Balance as of January 1, 2012 149,802,000  
Goodwill of acquired businesses 253,766,000  
Balance as of September 30, 2012 403,568,000  
Wholesale Brokerage [Member]
    
Goodwill [Line Items]    
Balance as of January 1, 2012 273,783,000  
Goodwill of acquired businesses 14,201,000  
Balance as of September 30, 2012 287,984,000  
Services [Member]
    
Goodwill [Line Items]    
Balance as of January 1, 2012 76,311,000  
Goodwill of acquired businesses 69,013,000  
Balance as of September 30, 2012 $ 145,324,000