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REVENUE RECOGNITION REVENUE RECOGNITION (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue Recognition and Deferred Revenue [Abstract]      
Interchange income $ 23.9 $ 30.4 $ 31.3
Credit card expense $ 12.2 $ 11.9 $ 11.0