Quarterly report pursuant to Section 13 or 15(d)

Property, Equipment and Software - Additional Information (Details)

v3.19.3
Property, Equipment and Software - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Property, Plant and Equipment [Line Items]          
Depreciation and amortization expense for property, equipment and software $ 7.5 $ 6.9 $ 22.7 $ 21.3  
Carrying amount of capitalized software development costs 63.1   63.1   $ 54.9
Software          
Property, Plant and Equipment [Line Items]          
Depreciation and amortization expense for property, equipment and software $ 3.9 $ 3.2 $ 10.9 $ 8.7