Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Narrative (Details)

v3.10.0.1
Share-Based Compensation - Narrative (Details)
$ in Millions
9 Months Ended
Sep. 30, 2018
USD ($)
plan
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Number of active share based compensation plans | plan 2
Unrecognized compensation expense related to unvested portion of stock options | $ $ 10.0
Weighted average period of recognition of unrecognized compensation expense 2 years