Commitments and Contingencies (tables)

3 Months Ended

Mar. 31, 2012

Commitments and Contingencies Disclosure Abstract

Schedule Of Environmental Loss Contingencies By Site Text Block

			Current Liabilities						Non-Current Liabilities
			Mar. 31,		Mar. 31,		Dec. 31,		Mar. 31,		Mar. 31,		Dec. 31,
Thousands			2012		2011		2011		2012		2011		2011
Portland Harbor site:
	Gasco/Siltronic Sediments	$	2,459	$	1,049	$	1,614	$	43,655	$	29,996	$	35,797
	Other Portland Harbor		1,400		2,314		1,893		3,547		5,829		7,066
Gasco site			13,197		12,574		14,092		7,689		6,103		8,900
Siltronic upland site			478		730		887		588		291		128
Central Service Center site			-		5		-		424		501		495
Front Street site			1,131		-		1,697		395		947		-
Other sites			-		-		-		116		117		120
	Total	$	18,665	$	16,672	$	20,183	$	56,414	$	43,784	$	52,506