Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2011

Supplemental Cash Flow Information [Abstract]

Components Of Change In Other Assets And Liabilities, Net

(add 000)	2011			2010			2009
Other current and noncurrent assets	$	2,439		$	3,245		$	(8,194	)
Accrued salaries, benefits and payroll taxes		(4,722	)		(1,415	)		(9,137	)
Accrued insurance and other taxes		2,873			(739	)		855
Accrued income taxes		6,139			10,890			2,414
Accrued pension, postretirement and postemployment benefits		(16,378	)		(22,257	)		6,339
Other current and noncurrent liabilities		(3,092	)		(3,491	)		3,207
Change in other assets and liabilities	$	(12,741	)	$	(13,767	)	$	(4,516	)

Schedule Of Noncash Investing And Financing Activities

(add 000)	2011		2010		2009
Noncash investing and financing activities:
Acquisition of assets through asset exchange	$	150,000	$	--	$	--
Acquisition of land through property exchange	$	--	$	1,900	$	--
Issuance of notes payable for acquisition of land	$	--	$	450	$	125
Note receivable issued in connection with divestiture and sale of assets	$	--	$	--	$	1,675