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Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]  
Sources of income from continuing operations before income taxes
The sources of income from continuing operations before income taxes and earnings of our unconsolidated equity method investments for the three and nine months ended September 30, 2017 and 2016 were as follows: 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2017
 
2016
 
2017
 
2016
U.S. operations
$
531

 
$
(92
)
 
$
2,029

 
$
1,652

Non-U.S. operations
61,799

 
28,182

 
93,457

 
85,469

Income from continuing operations before income taxes and earnings of unconsolidated equity method investments
$
62,330

 
$
28,090

 
$
95,486

 
$
87,121
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 from continuing operations consisted of the following:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2017
 
2016
 
2017
 
2016
Notional U.S. federal income tax expense at the statutory rate
$
21,815

 
$
9,831

 
$
33,420

 
$
30,492

U.S. state and local income tax, net
33

 
14

 
122

 
139

Non-U.S. operations:
 
 
 
 
 
 
 
Bermuda
(12,260
)
 
(6,025
)
 
(10,632
)
 
(16,687
)
Ireland
(315
)
 
82

 
(569
)
 
2,155

Singapore
(1,518
)
 
(823
)
 
(9,107
)
 
(4,874
)
Other low tax jurisdictions
(1,450
)
 
(752
)
 
(4,377
)
 
(2,835
)
Non-deductible expenses in the U.S.
(104
)
 
133

 
(298
)
 
418

Other
(6
)
 
(2
)
 
(23
)
 
(26
)
Provision for income taxes
$
6,195

 
$
2,458

 
$
8,536

 
$
8,782