Share-Based Compensation Share-Based Compensation (Compensation Expense) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2021 |
Jun. 30, 2020 |
Jun. 30, 2021 |
Jun. 30, 2020 |
|
Share-based Payment Arrangement [Abstract] | ||||
Share-based compensation | $ 607 | $ 516 | $ 1,138 | $ 933 |