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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - SBC, Pension and Other Postretirement Plans, Advertising , EPS (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES      
Discretionary matching and other contributions $ 1.4 $ 1.7 $ 2.0
Total advertising costs $ 9.2 $ 9.8 $ 7.6