Accumulated Other Comprehensive Income (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Balance at beginning of year	$ 3,253
Other comprehensive loss before reclassifications	(1,577)
Amounts reclassified from accumulated other comprehensive income	(539)
Net current period other comprehensive loss	(2,116)	(1,052)
Balance at end of period	1,137
Net Unrealized Gains And Losses On Investment Securities [Member]
Balance at beginning of year	16,060
Other comprehensive loss before reclassifications	(1,776)
Amounts reclassified from accumulated other comprehensive income	(539)
Net current period other comprehensive loss	(2,315)
Balance at end of period	13,745
Pension And Post-Retirement Obligations [Member]
Balance at beginning of year	(12,807)
Other comprehensive loss before reclassifications	199
Net current period other comprehensive loss	199
Balance at end of period	$ (12,608)