Income Taxes (Schedule Of Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Balance at beginning of period	$ 12,505	$ 13,135	$ 20,485
Gross increases-tax positions in prior years	564	910	2,152
Gross decreases-tax positions in prior years	(1,061)	(493)	(6,592)
Gross increases-tax positions in current year	40	64	130
Settlements	(111)	(1,111)	(3,040)
Lapse of statute of limitations	(268)
Balance at end of period	$ 11,669	$ 12,505	$ 13,135