Consolidated Statements Of Cash Flows Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Supplemental Cash Flow Information [Abstract]
Interest	$ 80,985	$ 119,463	$ 139,358
Income taxes	43,650	34,479	(5,862)
Fair value of assets acquired in acquisition	0	37,486	0
Liabilities assumed in acquisition	0	(13,389)	0
Noncash investing and financing activities, total	$ 0	$ 24,097	$ 0