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INCOME TAXES - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Tax Credit Carryforward [Line Items]    
Deferred tax asset payable to parent $ 88,000,000.0  
Income tax benefit related to net operating losses 12,600,000  
Deferred tax assets 263,603,000 $ 251,208,000
Deferred tax assets, valuation allowance 77,076,000 71,472,000
Unrecognized tax (benefit), accruals for interest and penalties 0  
Unrecognized tax benefits, income tax penalties accrued   0
Unrecognized tax benefits including tax interest accrued 5,300,000 4,100,000
Unrecognized tax benefits unrelated to federal income taxes statute of limitations expiring to be recognized in subsequent periods that would impact income tax expense, continuing operations 5,100,000 $ 4,000,000.0
Decrease in unrecognized tax benefits is reasonably possible 500,000  
Federal Tax Authority    
Tax Credit Carryforward [Line Items]    
Operating loss carryforwards 431,500,000  
Operating loss carryforwards not subject to expiration 59,300,000  
Operating loss carryforwards subject to expiration within twenty years 372,200,000  
State and Local Jurisdiction    
Tax Credit Carryforward [Line Items]    
Operating loss carryforwards 375,900,000  
Operating loss carryforwards not subject to expiration 79,900,000  
Federal and State Tax Credits    
Tax Credit Carryforward [Line Items]    
Operating loss carryforwards not subject to expiration 166,100,000  
Tax Credit Carryforward, Amount 16,600,000  
Tax credit carryforwards not subject to expiration 600,000  
Tax credit carryforwards, subject to expiration 16,000,000.0  
Deferred tax assets 176,400,000  
Foreign Tax Authority    
Tax Credit Carryforward [Line Items]    
Operating loss carryforwards not subject to expiration 374,300,000  
Operating loss carryforwards available to offset future income 413,700,000  
Operating loss carryforwards subject to expiration 39,400,000  
Deferred tax assets, valuation allowance $ 5,600,000