ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Schedule Of Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accumulated other comprehensive income (loss), net of tax	$ (82,106)	$ (66,574)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated other comprehensive income (loss)	(134,923)	(109,404)
Deferred tax liability (asset)	(52,817)	(42,830)
Accumulated other comprehensive income (loss), net of tax	(82,106)	(66,574)
Unrealized gains on investment securities available for sale [Member]
Accumulated other comprehensive income (loss)	33,809	26,565
Deferred tax liability (asset)	13,292	10,450
Accumulated other comprehensive income (loss), net of tax	20,517	16,115
Funded status of defined benefit plan [Member]
Accumulated other comprehensive income (loss)	(158,334)	(125,255)
Deferred tax liability (asset)	(62,003)	(49,049)
Accumulated other comprehensive income (loss), net of tax	(96,331)	(76,206)
Unrealized loss on cash flow hedges [Member]
Accumulated other comprehensive income (loss)	(10,398)	(10,714)
Deferred tax liability (asset)	(4,106)	(4,231)
Accumulated other comprehensive income (loss), net of tax	$ (6,292)	$ (6,483)