INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Increase in deferred tax allowance	$ 16,800	$ 16,800
Valuation allowance related to NOL carryfowards	9,000	9,000
Approximate amount of retained earnings for which no provision for income tax has been made	14,600	14,600	$ 14,600
Contribution to Blue Foundry Charitable Foundation		$ 9,000	$ 0
Charitable Contribution
Operating Loss Carryforwards [Line Items]
Charitable contribution tax credit carryforward, term		5 years
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	31,700	$ 31,700
State and Local Jurisdiction | New Jersey Division of Taxation
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 33,600	$ 33,600
Expiration term on state operating loss carryforwards	20 years	20 years