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Share-Based Compensation (Summary of Stock Option Activity) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2019
Sep. 30, 2018
Number of Shares    
Options outstanding, beginning balance (in shares) 500  
Granted (in shares) 0  
Exercised (in shares) 0  
Forfeited (in shares) 0  
Options outstanding, ending balance (in shares) 500  
Options exercisable (in shares) 400  
Weighted Average Exercise Price per Share    
Options outstanding, beginning balance (in dollars per share) $ 7.49  
Granted (in dollars per share) 0.00  
Exercised (in dollars per share) 0.00  
Forfeited (in dollars per share) 0.00  
Options outstanding, ending balance (in dollars per share) 7.49  
Options exercisable (in dollars per share) $ 7.49  
Options outstanding, weighted average remaining contractual term (in years)   5 years 6 months 28 days
Options exercisable, weighted average remaining contractual term (in years)   5 years 6 months 28 days
Options outstanding, aggregate intrinsic value $ 630  
Options exercisable, aggregate intrinsic value $ 504