Other Comprehensive Income (Loss) (Other Comprehensive Income (Loss) Components And Related Taxes) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income (loss)	$ (2,379)	$ (1,677)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments, Net of Tax	0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments, Net of Tax	(2,379)
Unrealized net holding gain (loss) on cash flow hedge, Net-of-tax amount	0	113
Change in pension plan assets and benefit obligations, net of income taxes		(412)
Unrealized gains (losses) on available-for-sale securities, Net-of-tax amount	$ (2,379)	$ (2,202)