XML 28 R21.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Other Income (Expenses) (Notes)
 12 Months Ended
Dec. 31, 2019
Other Income and Expenses [Abstract]  
OTHER INCOME (EXPENSE) OTHER INCOME (EXPENSE)
The principal components of other income (expense), net are as follows (in thousands):
    
 
Year Ended December 31,
 
2019
 
2018
 
2017
Interest and investment income
$
696

 
$
238

 
$
548

Income tax expense
(819
)
 
(327
)
 
(214
)
Other non-operating income
1

 
4

 
—

Total other income (expense)
$
(122
)
 
$
(85
)
 
$
334