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OTHER INCOME (EXPENSE) , NET
 6 Months Ended
Jun. 30, 2016
Other Income and Expenses [Abstract]  
OTHER INCOME (EXPENSE), NET
OTHER INCOME (EXPENSE), NET
The principal components of other income (expense), net, are as follows (in thousands):
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Interest and investment income
$
24

 
$
12

 
$
39

 
$
26

Income tax benefit (expense)
45

 
(35
)
 
(42
)
 
(119
)
Other non-operating income
30

 
—

 
126

 
—

Total other income (expense), net
$
99

 
$
(23
)
 
$
123

 
$
(93
)