The aggregate benefit recognized in earnings to allocate the assumed power contract liability in a systematic and rational manner over the contract period. As a noncash benefit, this element is subtracted from net income when calculating cash provided by or used in operations using the indirect method.

No definition available.

Acquisition of Sebree aluminum smelter (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended		13 Months Ended		2 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2013 Sebree Smelter [Member]	Jun. 30, 2014 Sebree Smelter [Member]	Jun. 30, 2013 Sebree Smelter [Member]	Jun. 30, 2014 Sebree Smelter [Member]	Jun. 01, 2013 Sebree Smelter [Member] t	Aug. 08, 2014 Sebree Working Capital Resolution [Member] Sebree Smelter [Member]
Business Acquisition [Line Items]
Sebree primary aluminum capacity (tonnes)									205,000
Purchase price for acquisition									$ 61,000
Purchase price cash paid			0	48,058				48,000		49,035
Gain on bargain purchase	0	5,253	0	5,253				5,253
Cash								48,083
Deferred purchase price								1,910
Inventories						59,018		59,018
Prepaid and other current assets						2,273		2,273
Property, plant and equipment – net						55,520		55,520
Total assets acquired						116,811		116,811
Accrued and other current liabilities						43,316		43,316
Accrued pension benefit costs						996		996
Accrued post retirement benefit costs						6,544		6,544
Other liabilities						7,476		7,476
Deferred taxes						3,233		3,233
Total liabilities assumed						61,565		61,565
Sebree power contract amortization			(5,534)	(2,741)		5,534
Pro forma revenues					413,907		861,605
Pro forma loss from continuing operations					$ (36,253)		$ (37,205)
Loss per common share, basic					$ (0.41)		$ (0.42)
Loss per common share, diluted					$ (0.41)		$ (0.42)