Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income (loss)	$ 30,384	$ (5,025)	$ (43,790)
Other comprehensive loss (income):
Amortization of prior service cost	177	177	57
Amortization of actuarial loss (benefit)	125	18	(179)
Adjustments to net periodic postretirement cost (benefit)	302	195	(122)
Comprehensive income (loss)	$ 30,082	$ (5,220)	$ (43,668)

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References+ Details

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Publisher SEC

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-Number 210

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Research Bulletin (ARB)

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-Name Accounting Research Bulletin (ARB)

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+ Details

- Definition

Net of tax amount of the income statement impact of the reclassification adjustment for prior service costs recognized as a component of net period benefit cost.

+ References

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+ Details