Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans (Details)

v3.19.1
Employee Benefit Plans (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Retirement Benefits [Abstract]      
Maximum deferral of pre-tax eligible compensation per terms of plan 100.00%    
Total expense for matching contribution $ 2.3 $ 1.2 $ 0.7