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Accumulated Other Comprehensive Income (Loss) (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance at beginning of year $ (9,011) $ (10,187) $ 3,253  
Other comprehensive income (loss) before reclassifications (1,483) 2,596 (13,451)  
Amounts reclassified from accumulated other comprehensive loss (833) (1,420) 11  
Net current period other comprehensive income (loss) (2,316) 1,176 (13,440)  
Balance at end of period (9,011) (10,187) 3,253 $ (11,327)
Securities Available For Sale and Transferred Securities [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance at beginning of year 1,625 (5,337) 16,060  
Other comprehensive income (loss) before reclassifications (938) 8,459 (20,613)  
Amounts reclassified from accumulated other comprehensive loss (1,383) (1,497) (784)  
Net current period other comprehensive income (loss) (2,321) 6,962 (21,397)  
Balance at end of period 1,625 (5,337) 16,060 (696)
Pension And Post-Retirement Items [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance at beginning of year (10,636) (4,850) (12,807)  
Other comprehensive income (loss) before reclassifications (545) (5,863) 7,162  
Amounts reclassified from accumulated other comprehensive loss 550 77 795  
Net current period other comprehensive income (loss) 5 (5,786) 7,957  
Balance at end of period $ (10,636) $ (4,850) $ (12,807) $ (10,631)