Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2015
Income Tax Disclosure [Abstract]  
Reconciliation of effective tax rate to the U.S. federal statutory tax rate
A reconciliation of the U.S. federal statutory tax rate to the Company’s effective income tax rate is as follows:
 
Three months ended September 30,

Nine months ended September 30,
 
2015
 
2014
 
2015
 
2014
U.S. federal statutory tax rate
35.0
 %
 
35.0
 %
 
35.0
 %
 
35.0
 %
State income taxes, net of federal benefit
5.7

 
1.8

 
(1.8
)
 
2.1

Non-U.S. income taxed at different rates
(29.1
)
 
—

 
4.2

 
—

Non-deductible expenses
0.2

 
(0.2
)
 
(2.4
)
 
0.1

Domestic production activities deduction
3.6

 
(1.9
)
 
—

 
(2.4
)
Return to accrual adjustments
—

 
(4.9
)
 
—

 
(1.8
)
Other
1.4

 
—

 
(0.1
)
 
—

Effective income tax rate
16.8
 %
 
29.8
 %
 
34.9
 %
 
33.0
 %
Schedule of deferred tax assets and liabilities
Deferred taxes are presented in the balance sheets as follows (in thousands):
 
 
September 30, 2015
 
December 31, 2014
Current deferred tax assets
 
$
1,835

 
$
2,696

Non-current deferred tax assets
 
19,392

 
12,907

Non-current deferred tax liabilities
 
(22,910
)
 
(25,982
)
Net deferred tax assets (liabilities)
 
$
(1,683
)
 
$
(10,379
)