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Equity Compensation (Equity Compensation Expense And Related Income Tax Benefit Recognized) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Restricted Stock    
Equity Compensation [Abstract]    
Pre-tax compensation expense $ 1,163 $ 936
Tax benefit 297 239
Stock expense, net of tax 866 697
Performance Shares    
Equity Compensation [Abstract]    
Pre-tax compensation expense 896 485
Tax benefit 228 124
Stock expense, net of tax $ 668 $ 361