INCOME TAXES - OPERATING LOSS AND TAX CREDIT CARRYFORWARDS (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating Loss and Tax Credit Carryforwards
Valuation allowances	$ 5.3	$ 10.0
Operating loss carryforwards, not expected to benefit the entity	157.9	157.9
U.S. Federal Income Tax
Operating Loss and Tax Credit Carryforwards
Net operating losses carryforwards	2.4	7.6
State Income Tax
Operating Loss and Tax Credit Carryforwards
Net operating losses carryforwards	159.8	185.9
Alternative minimum tax credit carryforwards	4.4	4.0
Foreign Income Tax
Operating Loss and Tax Credit Carryforwards
Net operating losses carryforwards	$ 8.8	$ 11.9