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Share-Based Compensation Share-Based Compensation (Compensation Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Share-based Payment Arrangement [Abstract]        
Share-based compensation $ 516 $ 410 $ 933 $ 728