Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Analysis of effective income tax rate for continuing operations
Notional U.S. federal income tax expense (benefit) at the statutory rate	$ (26,305)	$ (15,451)	$ (4,173)	$ 3,169
U.S. state and local income tax, net	39	37	125	86
Non-deductible expenses in the U.S.	107	71	306	183
Other	(8)	(7)	(24)	(16)
Income tax provision (benefit)	(597)	1,701	6,719	5,976
Bermuda [Member]
Analysis of effective income tax rate for continuing operations
Non-U.S. operations:	26,613	20,203	13,748	9,439
Ireland [Member]
Analysis of effective income tax rate for continuing operations
Non-U.S. operations:	(53)	(2,101)	(544)	(3,776)
Other [Member]
Analysis of effective income tax rate for continuing operations
Non-U.S. operations:	$ (990)	$ (1,051)	$ (2,719)	$ (3,109)