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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Advertising, Equity Offering Costs and Capitalized Interest (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Advertising and Marketing Costs      
Advertising and marketing expenses $ 21.0 $ 16.9 $ 11.5
Equity Offering Costs      
Equity offering costs 28.3 1.5 2.1
Capitalized Interest      
Interest costs, capitalized $ 1.9 $ 2.7 $ 3.0