Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - 2017 Acquisitions (Details)

v3.10.0.1
Acquisitions - 2017 Acquisitions (Details) - USD ($)
$ in Thousands
1 Months Ended 9 Months Ended
Oct. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Feb. 28, 2017
Jan. 31, 2017
Sep. 30, 2018
LRO            
Business Acquisition [Line Items]            
Total purchase price       $ 299,900   $ 299,923
PEX            
Business Acquisition [Line Items]            
Total purchase price $ 6,000         6,031
On-Site            
Business Acquisition [Line Items]            
Total purchase price   $ 251,100       251,109
AUM            
Business Acquisition [Line Items]            
Total purchase price     $ 69,400     69,412
Axiometrics            
Business Acquisition [Line Items]            
Total purchase price         $ 73,800 $ 73,757