Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of provision for (benefit from) income taxes in effective tax rates
Income taxes at U.S. federal statutory rate of 35%	$ (58,235)	$ (119,041)	$ (75,699)
Net state income taxes	(2,836)	(538)	(3,765)
Foreign taxes	14,607	5,085	22,289
Noncontrolling interest	(1,772)	(1,103)	3,134
Foreign tax credits	(9,925)	(11,431)	(6,497)
Unrecognized tax benefits	(166)	(741)	(817)
Valuation allowances	14,649	62,318	(1,892)
Goodwill impairment		53,988
Proceeds from sale of joint venture assets	(18,019)
Other	(678)	858	945
Provision for (benefit from) income taxes	$ (62,375)	$ (10,605)	$ (62,302)
Effective income tax rate (as a percent)	37.50%	3.10%	28.80%
Income taxes at U.S. federal statutory rate (as a percent)	35.00%

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.

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The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to total foreign income tax expense or benefit. The foreign income tax expense or benefit difference represents the income tax expense or benefit at applicable domestic statutory income tax rates applied to foreign earnings or loss for the period versus the foreign income tax expense or benefit calculated by applying the appropriate foreign tax rates.

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The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the year/accounting period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to all other items not otherwise listed in the existing taxonomy.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to foreign tax credits generated or utilized under enacted tax laws during the period.

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