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SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Jan. 01, 2022
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Total shareholders' equity $ 340,848   $ 447,992 $ 395,443 $ 364,761
Assets:          
Deferred income tax assets 127,823 $ 111,560 87,581    
Liabilities:          
Current portion of long-term debt 169,484 169,221 166,008    
Long-term debt 564,981 564,220 478,151    
Shareholders' equity:          
Additional paid-in capital 1,145,038 1,133,044 1,242,794    
Accumulated deficit (538,173) (527,347) (571,794)    
Accumulated Deficit          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Total shareholders' equity $ (538,173) 44,400 (571,794) $ (621,860) $ (640,909)
Interest adjustment due to ASU 2020-06 adoption   60,800      
Tax impacts due to ASU 2020-06 adoption   16,400      
Cumulative Effect, Period of Adoption, Adjustment          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Total shareholders' equity     (65,303)    
Assets:          
Deferred income tax assets   23,979      
Liabilities:          
Current portion of long-term debt   3,213      
Long-term debt   86,069      
Shareholders' equity:          
Additional paid-in capital   (109,750)      
Accumulated deficit   $ 44,447      
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Deficit          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Total shareholders' equity     $ 44,447