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OTHER INCOME
6 Months Ended
Jun. 30, 2017
Other Income and Expenses [Abstract]  
OTHER INCOME, NET OTHER INCOME

Other income consisted of the following for the periods set forth below (amounts in thousands):
 
Three months ended
 
Six months ended
 
June 30,
 
June 30,
 
2017
 
2016
 
2017
 
2016
Interest income
$
801

 
$
842

 
$
1,774

 
$
1,253

Equity investment income
530

 
1,086

 
1,350

 
1,583

Investment gain (loss) related to investments for deferred compensation
497

 
(291
)
 
1,347

 
(508
)
Building rental income
595

 
609

 
1,195

 
971

Discount amortization on prepaid royalty
181

 
320

 
509

 
779

Gain (loss) on sale of assets
70

 

 
(192
)
 
2,342

Other income (expense)
(466
)
 
483

 
(626
)
 
534

 
$
2,208

 
$
3,049

 
$
5,357

 
$
6,954