Environmental Matters (tables)

6 Months Ended

Jun. 30, 2013

Environmental Remediation Obligations [Abstract]

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

	Current Liabilities						Non-Current Liabilities
	June 30,				December 31,		June 30,				December 31,
In thousands	2013		2012		2012		2013		2012		2012
Portland Harbor site:
Gasco/Siltronic Sediments	$	427	$	2,340	$	2,207	$	38,058	$	43,066	$	36,087
Other Portland Harbor	1,729		1,286		1,767		2,598		3,409		3,160
Gasco Uplands site	11,354		12,606		18,722		8,230		10,769		5,028
Siltronic Uplands site	496		467		637		392		620		379
Central Service Center site	100		100		140		338		436		396
Front Street site	475		866		993		178		646		—
Oregon Steel Mills	—		—		—		179		117		185
Total	$	14,581	$	17,665	$	24,466	$	49,973	$	59,063	$	45,235

Environmental Regulatory Table [Table Text Block]

	June 30,				December 31,
In thousands	2013		2012		2012
Cash paid	$	83,936	$	62,468	$	71,124
Total regulatory asset deferral(1)	120,224		113,369		121,144