Income Taxes (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of the differences between taxes on income (loss) before income taxes
Income tax provision at statutory rate (Bermuda rate of 0%)	$ 0
Taxes (benefit) on U.S. and other international earnings (losses) at greater than the Bermuda rate	(109,101)	$ (83,747)	$ (33,277)
Increase (decrease) in valuation allowance	22,655	(9,934)	25,592
Tax reserves and interest	(12,679)	166,347	(39,921)
State income taxes (benefit)	1,087	(10,000)	(7,575)
Total income tax expense (benefit)	$ (98,038)	$ 62,666	$ (55,181)
Effective tax rate (as a percent)	22.90%	10.40%	52.00%