Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Valuation Inputs (Details)

v3.8.0.1
Fair Value Measurements - Valuation Inputs (Details) - Recurring - Contingent Consideration
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Discount rates 16.50%  
Volatility rates 24.00% 29.90%
Risk free rate of return 1.30%  
Minimum    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Discount rates   14.80%
Risk free rate of return   0.70%
Maximum    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Discount rates   27.80%