Income Taxes (Schedule Of Provision (Benefit) For Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Federal, Current	$ 48,068	$ 18,085	$ 14,571
State, Current	11,969	7,412	4,008
Foreign, Current	23,101	16,232	5,169
Federal and state, Deferred	15,117	3,654	10,412
Foreign, Deferred	2,039	3,716	(4,660)
Provision (benefit) for income taxes	$ 100,294	$ 49,099	$ 29,500