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Basis Of Presentation (Narrative) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Net present value of operating lease aggrements $ 24,884  
Accounting Standards Update 2016-02 [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Net present value of operating lease aggrements   $ 22,700