Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Deferred income tax liabilities:
Plant, equipment and intangibles	$ (63,524)	$ (49,394)
Deferred income tax assets:
Postretirement, pensions, and stock compensation	38,715	24,311
Reserves and accruals	19,594	11,463
Net operating loss and tax credit carryforwards	62,039	83,435
Valuation allowances	(24,945)	(32,777)
Deferred tax assets	95,403	86,432
Net deferred income tax asset	$ 31,879	$ 37,038

For entities that net deferred tax assets and tax liabilities, represents the unclassified net amount of deferred tax assets and liabilities as of the balance sheet date, which result from applying the applicable enacted tax rate to net temporary differences and carryforwards pertaining to assets or liabilities. A temporary difference is a difference between the tax basis of an asset or liability and its carrying amount in the financial statements prepared in accordance with generally accepted accounting principles that will reverse in ensuing periods.

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The sum of the tax effects as of the balance sheet date of the amount of the estimated future tax deductions arising from all employee compensation and benefits costs, which can only be deducted for tax purposes when the actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

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- Definition

The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from all currently nondeductible expenses reflected in all reserves and accrued liabilities, which can only be deducted for tax purposes when relevant losses are realized or relevant obligations are actually incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

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- Definition

The sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income.

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- Definition

The amount as of the balance sheet date of the estimated future tax effects attributable to the difference between the tax basis of capital assets and the basis of capital assets computed in accordance with generally accepted accounting principles. The difference in basis, attributable to different capitalization of costs, depreciation, or amortization methodologies, will increase future taxable income when such basis difference is realized. Capital assets include but are not limited to assets such as land, real estate, leasehold improvements, machinery and equipment and furniture and fixtures.

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