v3.10.0.1
Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Internal software development costs, amortization expense $ 10,141 $ 6,802
Software development costs    
Finite-Lived Intangible Assets [Line Items]    
Internal software development costs 12,666 5,547
Internal software development costs, amortization expense $ 3,832 $ 2,837