Quarterly report pursuant to Section 13 or 15(d)

BUSINESS COMBINATIONS (Details)

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BUSINESS COMBINATIONS (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Business Acquisition [Line Items]    
Goodwill $ 250,540 $ 211,847
Ten acquisitions in 2014
   
Business Acquisition [Line Items]    
Accounts receivable, net 2,360  
Materials and supplies 477  
Prepaid expenses 167  
Equipment and property 4,370  
Goodwill 40,521  
Customer contracts 35,089  
Other intangible assets 8,403  
Current liabilities (6,784)  
Other assets and liabilities, net (5,074)  
Total consideration paid 79,529  
Less: Common Stock Payment (16,413)  
Less: Contingent consideration liability (3,456)  
Total cash purchase price $ 59,660