STOCK-BASED COMPENSATION PLANS - Long-Term Incentive Program (Details) - USD ($) $ in Millions				12 Months Ended
	May 17, 2017	May 14, 2014	May 25, 2011	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	May 18, 2022
Share-based Arrangements with Employees and Nonemployees
Shares of common stock authorized for stock-based compensation plan (in shares)				4,000,000
Additional shares of common stock authorized for stock-based compensation plan (in shares)	1,000,000	1,000,000	900,000
Number of shares available for grant (in shares)				600,000			600,000
Nonqualified Stock Option [Member]
Share-based Arrangements with Employees and Nonemployees
Income tax benefit				$ 0.8	$ 0.7	$ 0.6
Stock-based compensation expense related to incentive and non-qualified stock options recognized				$ 3.2	$ 2.9	$ 2.6
Employee Stock Option [Member]
Share-based Arrangements with Employees and Nonemployees
Term of options				10 years
Award vesting period				5 years
Director's Stock Balance Plan [Member] | Nonqualified Stock Option [Member]
Share-based Arrangements with Employees and Nonemployees
Term of options				1 year
Term of options in event of death				2 years