Quarterly report pursuant to Section 13 or 15(d)

BUSINESS COMBINATIONS - Intangible Assets Acquired (Details)

v3.8.0.1
BUSINESS COMBINATIONS - Intangible Assets Acquired (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Business Acquisition [Line Items]    
Carrying Value, finite-lived intangible assets $ 238,083  
Internet domains    
Business Acquisition [Line Items]    
Carrying Value, indefinite-lived intangible assets 2,227  
Customer contracts    
Business Acquisition [Line Items]    
Carrying Value, finite-lived intangible assets $ 176,447 $ 152,869
Customer contracts | Minimum    
Business Acquisition [Line Items]    
Useful Life in Years 3 years  
Customer contracts | Maximum    
Business Acquisition [Line Items]    
Useful Life in Years 12 years  
Trademarks and tradenames    
Business Acquisition [Line Items]    
Carrying Value, finite-lived intangible assets $ 50,198 $ 49,998
Trademarks and tradenames | Minimum    
Business Acquisition [Line Items]    
Useful Life in Years 0 years  
Trademarks and tradenames | Maximum    
Business Acquisition [Line Items]    
Useful Life in Years 20 years  
Non-compete agreements    
Business Acquisition [Line Items]    
Carrying Value, finite-lived intangible assets $ 4,054  
Non-compete agreements | Minimum    
Business Acquisition [Line Items]    
Useful Life in Years 3 years  
Non-compete agreements | Maximum    
Business Acquisition [Line Items]    
Useful Life in Years 20 years  
Patents    
Business Acquisition [Line Items]    
Carrying Value, finite-lived intangible assets $ 2,405  
Patents | Minimum    
Business Acquisition [Line Items]    
Useful Life in Years 3 years  
Patents | Maximum    
Business Acquisition [Line Items]    
Useful Life in Years 15 years  
Other assets    
Business Acquisition [Line Items]    
Carrying Value, finite-lived intangible assets $ 2,752  
Useful Life in Years 10 years