Environmental Matters (tables)

9 Months Ended

Sep. 30, 2013

Environmental Remediation Obligations [Abstract]

Schedule of Environmental Loss Contingencies by Site [Table Text Block]

	Current Liabilities						Non-Current Liabilities
	September 30,				December 31,		September 30,				December 31,
In thousands	2013		2012		2012		2013		2012		2012
Portland Harbor site:
Gasco/Siltronic Sediments	$	512	$	1,748	$	2,207	$	38,034	$	43,628	$	36,087
Other Portland Harbor	1,812		1,188		1,767		2,315		3,186		3,160
Gasco Uplands site	2,094		18,018		18,722		7,126		7,453		5,028
Siltronic Uplands site	405		511		637		434		592		379
Central Service Center site	150		100		140		271		445		396
Front Street site	411		942		993		158		452		—
Oregon Steel Mills	—		—		—		179		185		185
Total	$	5,384	$	22,507	$	24,466	$	48,517	$	55,941	$	45,235

Environmental Regulatory Table [Table Text Block]

	September 30,				December 31,
In thousands	2013		2012		2012
Cash paid	$	93,264	$	64,709	$	71,124
Total regulatory asset deferral(1)	118,029		123,178		121,144