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Stock-Based Compensation (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 5 Months Ended 9 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Sep. 30, 2018
Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award        
Stock-based compensation $ 855 $ 1,082    
Expected cost on shares expected to vest $ 6,695      
Recognition period for compensation expense not yet recognized 4 years      
Restricted Stock | Vesting Period 2        
Share-based Compensation Arrangement by Share-based Payment Award        
Vesting period     1 year 3 years
Performance Share Units        
Share-based Compensation Arrangement by Share-based Payment Award        
Vesting period 3 years