XML 42 R21.htm IDEA: XBRL DOCUMENT v3.20.4
Other Income (Expenses) (Notes)
 12 Months Ended
Dec. 31, 2020
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,
202020192018
Interest and investment income$436 $696 $238 
Income tax benefit (expense)9 (819)(327)
Other non-operating income
2 1 4 
Total other income (expense)
$447 $(122)$(85)