Income Taxes (Jurisdictional Components of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Operating Loss Carryforwards [Line Items]
Gross, asset	$ 216,240	$ 310,467
Valuation allowance, asset	(228,417)	(318,055)
Net, asset	1,392,743	1,333,453
Net, liability	(1,404,920)	(1,341,041)
Net deferred income tax assets (liabilities)	(12,177)	(7,588)
U.S. Federal [Member]
Operating Loss Carryforwards [Line Items]
Gross, asset	33,103	93,970
Valuation allowance, asset	(55,980)	(117,901)
Net deferred income tax assets (liabilities)	(22,877)	(23,931)
State [Member]
Operating Loss Carryforwards [Line Items]
Gross, asset	45,813	51,799
Valuation allowance, asset	(34,156)	(35,155)
Net deferred income tax assets (liabilities)	11,657	16,644
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Gross, asset	63,110	68,365
Valuation allowance, asset	(64,067)	(68,666)
Net deferred income tax assets (liabilities)	(957)	(301)
Other Comprehensive Income (Loss) [Member]
Operating Loss Carryforwards [Line Items]
Gross, asset	74,214	96,333
Valuation allowance, asset	(74,214)	(96,333)
Net deferred income tax assets (liabilities)	$ 0	$ 0

The sum of the tax effects as of the balance sheet date of the amounts of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws ( before the valuation allowance, if any, to reduce such sum amount to net realizable value). Includes any tax benefit realized in deferred tax assets for significant impacts of tax planning strategies.

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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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- 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 cumulative amount of all deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A taxable temporary difference is a difference between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with generally accepted accounting principles that will result in taxable amounts in one or more future periods.

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