Income Taxes (Tables)

3 Months Ended

Mar. 31, 2013

Income Tax Disclosure [Abstract]

Sources of income from continuing operations before income taxes

The sources of income (loss) from continuing operations before income taxes for the three months ended March 31, 2012 and 2013 were as follows: 

	Three Months Ended March 31,
	2012		2013
U.S. operations	$	324	$	405
Non-U.S. operations	35,207		26,243
Total	$	35,531	$	26,648

Analysis of effective income tax rate for continuing operations

Differences between statutory income tax rates and our effective income tax rates applied to pre-tax income consisted of the following: 

	Three Months Ended March 31,
	2012			2013
Notional U.S. federal income tax expense (benefit) at the statutory rate	$	12,436		$	9,327
U.S. state and local income tax, net	24			34
Non-U.S. operations:
Bermuda	(8,632		)	(3,876		)
Ireland	(30		)	(901		)
Other	(920		)	(1,094		)
Non-deductible expenses in the U.S.	55			102
Other	(4		)	(7		)
Income tax provision (benefit)	$	2,929		$	3,585