Income Taxes (Schedule Of Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Unrecognized tax benefits, beginning balance	$ 9,803	$ 14,818
Gross increases - prior-period tax positions	2,770	140
Gross decreases - prior-period tax positions		(1,684)
Gross increases - current-period tax positions	1,014	358
Settlements	(1,758)	(2,234)
Lapse of statute of limitations	(1,152)	(1,595)
Unrecognized tax benefits, ending balance	$ 10,677	$ 9,803