Income Taxes (Components Of Net Income Before Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Domestic	$ 319,907	$ 309,391	$ 360,937
Foreign	8,046	6,852	6,795
Income Loss From Continuing Operations Before Income Taxes And Minority Interest	$ 327,953	$ 316,243	$ 367,732