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Income Taxes (Tables)
 6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]  
Income Tax (Benefit) Expense
The following table summarizes the differences:
(in thousands)
 
Three months ended June 30,
 
Six months ended June 30,
 
 
2019

 
2018

 
2019

 
2018

Income tax (benefit) expense at United States statutory income tax rate
 
$
(48
)
 
$
(855
)
 
$
472

 
$
(1,348
)
Valuation allowance
 
97

 
822

 
(1,234
)
 
1,354

Non-deductible compensation
 
25

 
62

 
34

 
123

Disposition of subsidiary
 
(24
)
 
—

 
(24
)
 
—

State income tax
 
32

 
67

 
58

 
133

Change in unrecognized tax benefits(1)
 
71

 
60

 
141

 
130

Indefinite life intangibles
 
54

 
24

 
87

 
46

Foreign operations subject to different tax rates
 
(20
)
 
(39
)
 
(17
)
 
(54
)
Other
 
(19
)
 
49

 
(62
)
 
60

Income tax expense (benefit)
 
$
168

 
$
190

 
$
(545
)
 
$
444

(1) Includes interest and penalty expense related to unrecognized tax benefits.