Income Taxes (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of the differences between taxes on income (loss) before income taxes
Taxes (benefit) on U.S. and other international earnings (losses) at greater than the Bermuda rate	$ (83,747)	$ (33,277)	$ (39,830)
Increase (decrease) in valuation allowance	(9,934)	25,592	33,730
Tax reserves and interest	166,347	(39,921)	26,176
State income taxes (benefit)	(10,000)	(7,575)	20,910
Total income tax expense (benefit)	$ 62,666us-gaap_IncomeTaxExpenseBenefit	$ (55,181)us-gaap_IncomeTaxExpenseBenefit	$ 40,986us-gaap_IncomeTaxExpenseBenefit
Effective tax rate (as a percent)	(10.40%)	(52.00%)	14.80%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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