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Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2011

Supplemental Cash Flow Information [Abstract]

Schedule Of Supplemental Cash Flow Information

		Years Ended December 31
		2011				2010				2009
Cash paid during the year for
Interest and financing expenses (net of capitalization)		$	17,329			$	15,884			$	12,456
Income taxes		$	96,919			$	59,949			$	94,093

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