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OTHER INCOME (Tables)
9 Months Ended
Sep. 30, 2017
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
 
Nine months ended
 
September 30,
 
September 30,
 
2017
 
2016
 
2017
 
2016
Equity investment income
$
1,391

 
$
840

 
$
2,741

 
$
2,423

Interest income
872

 
929

 
2,646

 
2,182

Investment gain related to investments for deferred compensation
480

 
560

 
1,827

 
52

Building rental income
594

 
557

 
1,789

 
1,528

Discount amortization on prepaid royalty
180

 
389

 
689

 
1,168

Gain (loss) on sale of assets
(542
)
 
(71
)
 
(734
)
 
2,271

Other income (expense)
66

 
374

 
(560
)
 
908

 
$
3,041

 
$
3,578

 
$
8,398

 
$
10,532