Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Disclosure of Share-based Compensation Arrangements by Share-based Payment Award (Details)

v3.8.0.1
Stock-Based Compensation - Disclosure of Share-based Compensation Arrangements by Share-based Payment Award (Details) - Restricted Shares [Member]
3 Months Ended
Mar. 31, 2018
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding and unvested at beginning 605,969
Granted
Vested (150,482)
Forfeited (1,000)
Outstanding and unvested at ending 454,487