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Share-Based Compensation (Share-based Compensation Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Cash received from stock option exercises $ 701 $ 358 $ 2,162
Compensation cost, all share-based awards 123 145 60
Excess tax benefits related to share-based compensation $ (7) $ 4 $ 8