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OTHER INCOME (Tables)
3 Months Ended
Mar. 31, 2018
Other Income and Expenses [Abstract]  
Other Income [Table Text Block] Other income consisted of the following for the periods set forth below (amounts in thousands):
 
Three months ended
 
March 31,
 
2018
 
2017
Equity investment income
$
1,116

 
$
810

Interest income
617

 
973

Building rental income
578

 
600

Gain (loss) on sale of assets
181

 
(262
)
Discount amortization on prepaid royalty
172

 
328

Investment gain related to investments for deferred compensation
121

 
850

Other income (expense)
4,965

 
(622
)
 
$
7,750

 
$
2,677