Supplemental Disclosures Of Cash Flow Information (Summary Of Amounts Paid) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Interest paid	$ 75,653	$ 76,911	$ 71,288
Income taxes paid	188,510	195,172	87,376
Parent Company [Member]
Interest paid	$ 74,569	$ 75,909	$ 73,031