Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Additional Information (Details)

v3.6.0.2
Employee Benefit Plans - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]      
Contributions to employee benefit plans $ 2.4 $ 1.9 $ 1.3
Accrued liabilities related to employee obligations $ 0.9 $ 0.7 $ 0.6