Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Unrealized holding gains (losses) on available for sale arising during period, tax effect	$ 10,982	$ (1,851)	$ (3,365)
Reclassification adjustment for (gains) losses included in net income, tax effect	275	874	727
Unrealized gain (loss) on cash flow hedging derivatives, tax effect	(2,510)	(32)	3,530
Net actuarial loss arising during period, tax effect	(391)	563	361
Reclassification of amortization of prior service cost included in net periodic cost, tax effect	$ (94)	$ (56)	$ (32)