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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, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Accumulated Other Comprehensive Loss [Line Items] |  |  |
Components of accumulated other comprehensive loss | $ 189,516 | $ 168,137 | $ 153,966
Unrealized Losses on Securities |  |  |
Accumulated Other Comprehensive Loss [Line Items] |  |  |
Components of accumulated other comprehensive loss | 1,261 | (1,651) |
Pension Liability |  |  |
Accumulated Other Comprehensive Loss [Line Items] |  |  |
Components of accumulated other comprehensive loss | (7,114) | (7,566) |
Accumulated Other Comprehensive Loss |  |  |
Accumulated Other Comprehensive Loss [Line Items] |  |  |
Components of accumulated other comprehensive loss | $ (5,853) | $ (9,217) | $ (7,092)

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