INCOME TAX - Reconciliation Between Income Tax Expense and Computed Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax at Federal statutory rate	$ 21.8	$ 18.4	$ 17.6
State and local income taxes, net of federal tax benefit	3.7	2.9	3.0
Reversal of valuation allowances	0.0	(3.4)	(0.9)
2017 TCJA, net deferred tax remeasurement and repatriation tax impacts	(0.2)	0.0	0.0
Stock based compensation	0.0	(0.8)	(0.5)
Non-deductible items	0.7	0.5	0.8
Other items, net	(0.3)	(0.1)	(0.1)
Income tax	$ 25.7	$ 17.5	$ 19.9
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income tax at Federal statutory rate	21.00%	21.00%	21.00%
State and local income taxes, net of federal tax benefit	3.70%	3.30%	3.50%
Reversal of valuation allowances	0.00%	(3.80%)	(1.00%)
2017 TCJA, net deferred tax remeasurement and repatriation tax impacts	(0.001)	0.000	0.000
Stock based compensation	0.00%	(0.90%)	(0.60%)
Non-deductible items	0.60%	0.50%	0.90%
Other items, net	(0.40%)	(0.10%)	(0.10%)
Income tax	24.80%	20.00%	23.70%