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INCOME TAXES (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]          
Domestic   $ (36,761) $ (52,234) $ (298)  
Foreign   (21,370) 4,190 20,105  
(Loss) income before income taxes   (58,131) (48,044) 19,807  
Income Tax Expense (Benefit), Continuing Operations [Abstract]          
Current Federal Tax Expense (Benefit)   (4,050) (4,599) (2,379)  
Current State and Local Tax Expense (Benefit)   326 622 (65)  
Current Foreign Tax Expense (Benefit)   13,677 9,752 11,497  
Current Income Tax Expense (Benefit)   9,953 5,775 9,053  
Deferred Federal Income Tax Expense (Benefit)   0 0 0  
Deferred State and Local Income Tax Expense (Benefit)   0 0 0  
Deferred Foreign Income Tax Expense (Benefit)   (3,007) (2,300) (2,291)  
Deferred Income Tax Expense (Benefit)   (3,007) (2,300) (2,291)  
Income Tax Expense (Benefit)   $ 6,946 $ 3,475 $ 6,762  
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]          
Statutory U.S. federal tax rate 21.00% 21.00% 21.00% 21.00% 35.00%
Unrecognized tax positions   5.90% 6.10% (12.40%)  
Impact of foreign income   (8.20%) (2.20%) (8.80%)  
Valuation allowance   (38.40%) (29.00%) (0.20%)  
State taxes, net   (0.70%) (0.90%) 0.30%  
Nondeductible royalty   (1.20%) (1.50%) 3.80%  
Tax Cuts and Jobs Act   0.00% 0.00% 26.60%  
Other, net   1.00% (0.70%) 3.80%  
Effective tax rate   (11.90%) (7.20%) 34.10%  
SEC Schedule, 12-09, Valuation Allowances and Reserves, Period Increase (Decrease)   $ 22,300 $ 13,900    
Components of Deferred Tax Assets and Liabilities [Abstract]          
Net operating loss carryforwards   151,597 129,599    
Pension   3,904 5,026    
Inventory   6,758 6,673    
Warranty   5,648 4,004    
Employee benefits and related costs   9,819 8,255    
Prepaid royalties   3,755 4,092    
Deferred Tax Asset, Interest Limitation   16,067 11,067    
Deferred Tax Assets, Leasing Arrangements   7,734 7,164    
Deferred Tax Liabilities, Leasing Arrangements   (7,759) (7,047)    
Other   19,633 17,847    
Deferred tax assets   224,915 193,727    
Fixed assets   (15,603) (21,846)    
Intangible assets   (1,012) (3,136)    
Other   (2,669) (1,359)    
Deferred tax liabilities   27,043 33,388    
Subtotal   197,872 160,339    
Valuation allowance   (199,176) (164,680)    
Net deferred tax liability   (1,304) (4,341)    
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration   3,300      
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration   148,300      
SEC Schedule, 12-09, Valuation Allowances and Reserves, Increase (Decrease) Adjustment   34,500 13,100    
Deferred Tax Assets, Operating Loss Carryforwards, Domestic   193,200      
Deferred Tax Assets, Operating Loss Carryforwards, State and Local   299,100      
Deferred Tax Assets, Operating Loss Carryforwards, Foreign   378,100      
Unrecognized Tax Benefits, Gross   800 4,500 $ 8,900  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate   800      
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]          
Balance at January 1   1,012 4,097 7,406 $ 9,365
Increases to tax positions taken during the current year   0 0 19  
Increases to tax positions taken during the prior years   13 973 0  
Decreases to tax positions taken during prior years   0 (350) (1,336)  
Decreases due to lapse of statutes of limitations   (3,099) (3,429) (637)  
Settlements   0 (506) 0  
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation     3 5  
Unrecognized Tax Benefits, Increase Resulting from Foreign Currency Translation   1      
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense   (1,100) (1,000) 500  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued   $ 300 $ 1,400 $ 2,400