Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details)

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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]      
Goodwill impairment loss $ 0   $ 0
Goodwill accumulated impairment loss 0   0
Amortization of intangible assets 7,000,000.0 $ 8,500,000  
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, gross $ 248,518,000   248,518,000
Residual buyouts      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, gross     2,200,000
Intangible assets, fair value     500,000
Impairment charge for intangible asset     $ 1,800,000