Shareholders' Equity (Schedule Of Changes In Equity) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Stockholders' Equity Note [Abstract]
Accumulated foreign currency translation adjustments	$ (1,295)	$ (1,776)
Unrealized loss on available-for-sale security, net of tax	0	(226)
Employee benefit plans, net of tax	(455,166)	(436,434)
Accumulated other comprehensive loss	$ (456,461)	$ (438,436)