Employee Benefit Plans (Schedule Of Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Net loss	$ 979	$ 8,234	$ 1,132
Amortization of net loss	(1,569)	(685)	(744)
Amortization of prior service cost	117	117	117
Total recognized in other comprehensive income	(473)	7,666	505
Total recognized in net periodic benefit costs and other comprehensive income	$ 1,622	$ 12,794	$ 5,704