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OTHER ASSETS (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Other Assets, Noncurrent [Abstract]    
Equity Method Investments $ 0 $ 0
Amortizable intangibles 15,275 16,401
Notes receivable 6,000 6,000
Manufacturing spares 3,448 2,386
Prepaid software 691 3,807
Deferred financing costs 352 273
Investments for deferred compensation 0 9,668
Income tax receivable 0 5,668
Prepaid royalty 0 1,702
Other 4,222 5,031
Other noncurrent assets 81,892 94,851
Equity Method Investments [Member]    
Other Assets, Noncurrent [Abstract]    
Equity Method Investments 4,637 3,149
Wheels India [Member]    
Other Assets, Noncurrent [Abstract]    
Equity Method Investments $ 47,267 $ 40,766