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Share-Based Payment Arrangements (Schedule of Options, Grants in Period and Grant Date Intrinsic Value) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Cost of share-based payments (non-cash)     $ 514 $ 37
Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Intrinsic value of options exercised     845 122
Cost of share-based payments (non-cash)
Income tax benefit of share-based payments recognized in income