Income Taxes (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of the differences between taxes on income (loss) before income taxes
Taxes on U.S. and other international earnings (losses) at greater than the Bermuda rate				$ (33,277)	$ (39,830)	$ 122,292
Increase (decrease) in valuation allowance				25,592	33,730	4,785
Effect of change in tax rate						(258)
Tax reserves and interest				(39,921)	26,176	12,993
State income taxes				(7,575)	20,910	25,271
Total income tax expense (benefit)	(35,268)	75,771	40,503	(55,181)	40,986	165,083
Effective tax rate (as a percent)				(52.00%)	14.80%	32.00%
Additional interest expense for uncertain tax positions				$ 10,200