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FAIR VALUE MEASUREMENTS AND INVESTMENTS - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Fair value measurements            
Payment for investment   $ 4,155        
Loss on equity investments $ (4,222) $ (2,188)        
Privately Held Investment            
Fair value measurements            
Payments to acquire equity method investment     $ 2,800      
Ownership percentage     24.00%      
Loss on equity investments       $ 400    
Currency gains (losses)       400    
Equity Security            
Fair value measurements            
Investments 16,500     16,500    
India solar operations            
Fair value measurements            
Carrying value 13,400     13,900    
Decrease in equity method investments 500          
Currency gains (losses) (200)          
Operating losses on equity investments 300          
Other Assets | Privately Held Investment            
Fair value measurements            
Carrying value 14,800     14,800    
Other investments            
Fair value measurements            
Remaining Level 3 investments increase 100          
Other investments | Renewable energy partnership            
Fair value measurements            
Investment Tax Credit         $ 12,000  
Equity investments 2,000     1,900    
Investment cost           $ 14,400
Carrying Value            
Fair value measurements            
Long-term debt 394,000     366,500    
Carrying Value | Other Assets | Equity Security            
Fair value measurements            
Investments 6,100     1,300    
Increase due to gain recognized 4,800          
Level 2 | Total            
Fair value measurements            
Long-term debt $ 400,800     $ 373,700