SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule Of Components Of The Accumulated Other Comprehensive Income, Net Of Taxes) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Loss [Line Items]
Components of accumulated other comprehensive loss	$ 120,061	$ 114,715	$ 110,022	$ 106,802
Unrealized (Losses) Gains on Securities
Accumulated Other Comprehensive Loss [Line Items]
Components of accumulated other comprehensive loss	(266)	1,164
Pension Liability
Accumulated Other Comprehensive Loss [Line Items]
Components of accumulated other comprehensive loss	(5,758)	(5,890)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss [Line Items]
Components of accumulated other comprehensive loss	$ (6,024)	$ (4,726)	$ (2,723)	$ 106