Income Taxes (Changes In Gross Liability For Unrecognized Tax Benefits Excluding Interest And Penalties) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Income Tax Expense (Benefit) [Abstract]
Unrecognized tax benefits, beginning of period	$ 57,137	$ 69,805
Increase in unrecognized tax benefits for tax positions taken in a prior period	1,806	13,745
Decrease in unrecognized tax benefits for tax positions taken in a prior period	(6,439)	(21,574)
Increase in unrecognized tax benefits for tax positions taken in the current period	3,737	3,036
Statute lapses	(415)	(2,249)
Settlements with taxing authorities	(7,074)	(5,626)
Unrecognized tax benefits, end of period	$ 48,752	$ 57,137