Quarterly report pursuant to Section 13 or 15(d)

BUSINESS COMBINATIONS - Narrative (Details)

v3.8.0.1
BUSINESS COMBINATIONS - Narrative (Details)
customer in Thousands
 3 Months Ended 12 Months Ended
Aug. 01, 2017
acquisition
location
customer
Mar. 31, 2018
USD ($)
acquisition
Sep. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
acquisition
Business Acquisition [Line Items]        
Number of acquisitions | acquisition   16   23
Carrying amount of goodwill   $ 364,606,000   $ 346,514,000
Carrying amount of goodwill in foreign countries   46,500,000   46,300,000
Goodwill and intangible asset impairment     $ 0  
Finite-lived intangible assets, net   238,083,000    
Other countries        
Business Acquisition [Line Items]        
Finite-lived intangible assets, net   1,700,000   1,700,000
Customer contracts        
Business Acquisition [Line Items]        
Finite-lived intangible assets, net   176,447,000   152,869,000
Customer contracts | Other countries        
Business Acquisition [Line Items]        
Finite-lived intangible assets, net   33,000,000   29,800,000
Trademarks and tradenames        
Business Acquisition [Line Items]        
Finite-lived intangible assets, net   50,198,000   49,998,000
Other Intangible Assets        
Business Acquisition [Line Items]        
Finite-lived intangible assets, net   11,400,000   11,600,000
Other Intangible Assets | Other countries        
Business Acquisition [Line Items]        
Finite-lived intangible assets, net   $ 1,600,000   $ 1,700,000
Northwest Exterminating        
Business Acquisition [Line Items]        
Number of acquisitions | acquisition 23      
Number of states in which entity operates | location 5      
Number of customers | customer 120