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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule Of Components Of The Accumulated Other Comprehensive Income, Net Of Taxes) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accumulated Other Comprehensive Loss [Line Items]      
Components of accumulated other comprehensive loss $ 168,137 $ 153,966 $ 120,061
Unrealized Losses on Securities      
Accumulated Other Comprehensive Loss [Line Items]      
Components of accumulated other comprehensive loss (1,651) (957)  
Pension Liability      
Accumulated Other Comprehensive Loss [Line Items]      
Components of accumulated other comprehensive loss (7,566) (6,135)  
Accumulated Other Comprehensive Loss      
Accumulated Other Comprehensive Loss [Line Items]      
Components of accumulated other comprehensive loss $ (9,217) $ (7,092) $ (6,024)