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Goodwill and Identifiable Assets (Acquired Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Intangible Assets [Line Items]      
Amortization of intangible assets $ 21,751 $ 18,016 $ 2,346
Intangible assets subject to amortization:      
Gross Carrying Amount 176,368 144,142  
Accumulated Amortization 73,988 52,154  
Net Carrying Amount 102,380 91,988  
Intangible assets not subject to amortization:      
Trademarks, Carrying Amount 186,075 171,852  
Goodwill 574,948 496,158 229,234
Total      
Gross Carrying Amount 937,391 812,152  
Net Carrying Amount 863,403 759,998  
Customer Relationships [Member]
      
Intangible assets subject to amortization:      
Gross Carrying Amount 110,007 103,285  
Accumulated Amortization 41,564 23,338  
Net Carrying Amount 68,443 79,947  
Customer Relationships [Member] | Minimum [Member]
      
Intangible Assets [Line Items]      
Estimated Useful Life 3 months    
Customer Relationships [Member] | Maximum [Member]
      
Intangible Assets [Line Items]      
Estimated Useful Life 10 years    
Contractor Relations [Member]
      
Intangible assets subject to amortization:      
Gross Carrying Amount 43,598 37,871  
Accumulated Amortization 30,737 27,754  
Net Carrying Amount 12,861 10,117  
Contractor Relations [Member] | Minimum [Member]
      
Intangible Assets [Line Items]      
Estimated Useful Life 2 years    
Contractor Relations [Member] | Maximum [Member]
      
Intangible Assets [Line Items]      
Estimated Useful Life 7 years    
Software [Member]
      
Intangible assets subject to amortization:      
Gross Carrying Amount 18,900    
Accumulated Amortization 263    
Net Carrying Amount 18,637    
Noncompete Agreements [Member]
      
Intangible assets subject to amortization:      
Gross Carrying Amount 3,863 2,986  
Accumulated Amortization 1,424 1,062  
Net Carrying Amount $ 2,439 $ 1,924  
Noncompete Agreements [Member] | Minimum [Member]
      
Intangible Assets [Line Items]      
Estimated Useful Life 2 years    
Noncompete Agreements [Member] | Maximum [Member]
      
Intangible Assets [Line Items]      
Estimated Useful Life 7 years