Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2011

Supplemental Cash Flow Information [Abstract]

Schedule Of Supplemental Disclosures Of Cash Flow Information

	Years Ended December 31,
	2011		2010		2009
Cash Paid During the Year For:
Interest	$	26,463	$	25,890	$	26,937
Loss on the sale of trade accounts receivable		—		—		423
Income taxes, net		50,921		59,121		65,419