Quarterly report pursuant to Section 13 or 15(d)

Business Combinations - Intangibles (Details)

v3.10.0.1
Business Combinations - Intangibles (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
2018 Acquisitions    
Estimates of acquired intangible assets    
Estimated Fair Value $ 181,840  
Weighted Average Estimated Useful Life (Years) 11 years  
2018 Acquisitions | Customer relationships    
Estimates of acquired intangible assets    
Estimated Fair Value $ 169,320  
Weighted Average Estimated Useful Life (Years) 12 years  
2018 Acquisitions | Trademarks and trade names    
Estimates of acquired intangible assets    
Estimated Fair Value $ 11,260  
Weighted Average Estimated Useful Life (Years) 9 years  
2018 Acquisitions | Non-Compete    
Estimates of acquired intangible assets    
Estimated Fair Value $ 1,260  
Weighted Average Estimated Useful Life (Years) 5 years  
2017 Acquisitions    
Estimates of acquired intangible assets    
Estimated Fair Value   $ 33,580
Weighted Average Estimated Useful Life (Years)   9 years
2017 Acquisitions | Customer relationships    
Estimates of acquired intangible assets    
Estimated Fair Value   $ 26,170
Weighted Average Estimated Useful Life (Years)   10 years
2017 Acquisitions | Trademarks and trade names    
Estimates of acquired intangible assets    
Estimated Fair Value   $ 1,780
Weighted Average Estimated Useful Life (Years)   10 years
2017 Acquisitions | Non-Compete    
Estimates of acquired intangible assets    
Estimated Fair Value   $ 5,630
Weighted Average Estimated Useful Life (Years)   5 years