Quarterly report pursuant to Section 13 or 15(d)

Property, Equipment and Software - Additional Information (Details)

v3.19.1
Property, Equipment and Software - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Property, Plant and Equipment [Line Items]      
Depreciation and amortization expense for property, equipment and software $ 7.5 $ 6.9  
Carrying amount of capitalized software development costs 57.1   $ 54.9
Software      
Property, Plant and Equipment [Line Items]      
Depreciation and amortization expense for property, equipment and software $ 3.2 $ 2.6