Environmental Matters (Tables)

12 Months Ended

Dec. 31, 2014

Environmental Remediation Obligations [Abstract]

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

	Current Liabilities				Non-Current Liabilities
In thousands	2014		2013		2014		2013
Portland Harbor site:
Gasco/Siltronic Sediments	$	1,767	$	1,278	$	38,019	$	37,954
Other Portland Harbor	1,934		1,766		4,338		3,478
Gasco Upland site	9,535		11,010		37,117		39,508
Siltronic Upland site	957		763		348		406
Central Service Center site	171		85		—		248
Front Street site	1,020		1,274		122		122
Oregon Steel Mills	—		—		179		179
Total	$	15,384	$	16,176	$	80,123	$	81,895

Environmental Regulatory Table [Table Text Block]

In thousands	2014		2013
Cash paid(1)	$	113,740	$	98,817
Total regulatory asset deferral(2)	58,859		148,389