Cash Flows (Summary Of Non-Cash Activities And Other Supplemental Data) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Noncash Investing and Financing Items [Abstract]
Increase in capital lease assets	$ 865	$ 0
Increase in capital lease obligations and related assets	0	1,473
Capital expenditures incurred but not yet paid	815	0
Cash interest paid — continuing operations	34,561	43,526
Income taxes paid, net — continuing operations	$ 83,030	$ 1,973