Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Goodwill and Intangible Assets (Details)

v3.6.0.2
Summary of Significant Accounting Policies - Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Aug. 31, 2014
Dec. 31, 2016
Minimum    
Goodwill [Line Items]    
Intangible assets amortization period   1 year
Maximum    
Goodwill [Line Items]    
Intangible assets amortization period   15 years
EEX    
Goodwill [Line Items]    
Payments to acquire businesses $ 9,054  
Security deposit with third-party escrow agent $ 834