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Share-Based Compensation (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
CEO Retirement Additional Expense [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Additional stock compensation expense in connection with retirement of former President and CEO   $ 2,225
Selling, General and Administrative [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Allocated share-based compensation expense $ 960 $ 3,325