Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Narrative (Details)

v3.20.1
Fair Value Measurements - Narrative (Details)
$ in Millions
3 Months Ended
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Aug. 31, 2016
USD ($)
Compstak          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Carrying value of investment         $ 3.0
Additional investment $ 1.8        
Other assets | Compstak          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Carrying value of investment     $ 7.4 $ 7.4  
Level 2 | Compstak | Non recurring          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Investment gain   $ 2.6      
Discount Rate | Recurring          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Contingent considation, measurement input       0.056  
Estimated Volatility | Recurring          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Contingent considation, measurement input       0.138  
Annual Revenue Growth Rate | Recurring          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Contingent considation, measurement input       0.444  
Risk of Target Metric | Recurring          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Contingent considation, measurement input       0.046