Annual report pursuant to Section 13 and 15(d)

Benefit Plans - 2015 Long-Term Stock Incentive Plan (Details)

v3.10.0.1
Benefit Plans - 2015 Long-Term Stock Incentive Plan (Details)
shares in Thousands
12 Months Ended
Dec. 31, 2018
shares
Performance-based Share Awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Award vesting period 3 years
2015 Long Term Stock Incentive Plan  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Restricted stock conversion to common stock 1
Common stock available for future grants (in shares) 154,973
2015 Long Term Stock Incentive Plan | Employees and Non Employee Stock Option  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock option expiration period 10 years
2015 Long Term Stock Incentive Plan | Minimum  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Award vesting period 3 years
2015 Long Term Stock Incentive Plan | Maximum  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Award vesting period 4 years