Environmental Matters (tables)

9 Months Ended

Sep. 30, 2014

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	2014		2013		2013		2014		2013		2013
Portland Harbor site:
Gasco/Siltronic Sediments	$	686	$	512	$	1,278	$	38,593	$	38,034	$	37,954
Other Portland Harbor	1,060		1,812		1,766		3,198		2,315		3,478
Gasco Uplands site	7,399		2,094		11,010		37,748		7,126		39,508
Siltronic Uplands site	634		405		763		577		434		406
Central Service Center site	70		150		85		173		271		248
Front Street site	804		411		1,274		99		158		122
Oregon Steel Mills	—		—		—		179		179		179
Total	$	10,653	$	5,384	$	16,176	$	80,567	$	48,517	$	81,895

Environmental Regulatory Table [Table Text Block]

	September 30,				December 31,
In thousands	2014		2013		2013
Cumulative cash paid(1)	$	111,367	$	93,264	$	98,817
Total regulatory asset deferral(2)	$	51,861	118,029		148,389