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OTHER INCOME
9 Months Ended
Sep. 30, 2016
Other Income and Expenses [Abstract]  
OTHER INCOME, NET
OTHER INCOME

Other income consisted of the following (amounts in thousands):
 
Three months ended
 
Nine months ended
 
September 30,
 
September 30,
 
2016
 
2015
 
2016
 
2015
Wheels India Limited equity income
$
800

 
$
515

 
$
2,449

 
$
1,375

Gain on sale of assets

 
255

 
2,342

 
312

Interest income
929

 
452

 
2,182

 
2,016

Building rental income
557

 
253

 
1,528

 
751

Discount amortization on prepaid royalty
389

 
458

 
1,168

 
1,541

Investment gain (loss) related to contractual obligation investments
560

 
(973
)
 
52

 
(639
)
Other income (expense)
343

 
(205
)
 
811

 
975

 
$
3,578

 
$
755

 
$
10,532

 
$
6,331