FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Financial instruments (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair value disclosure
Outstanding withdrawal liability	$ 19,000
Accrued expenses
Fair value disclosure
Outstanding withdrawal liability	700
Carrying Value
Fair value disclosure
Financial instruments	222,627	$ 248,340
Fair Value | Level 2
Fair value disclosure
Financial instruments	219,100	245,369
Credit Facility | Carrying Value
Fair value disclosure
Financial instruments	50,000	50,000
Credit Facility | Fair Value | Level 2
Fair value disclosure
Financial instruments	50,000	50,000
Notes payable | Carrying Value
Fair value disclosure
Financial instruments	153,587	178,938
Notes payable | Fair Value | Level 2
Fair value disclosure
Financial instruments	151,719	177,149
New England Pension Fund withdrawal liability | Carrying Value
Fair value disclosure
Financial instruments	19,040	19,402
New England Pension Fund withdrawal liability | Fair Value | Level 2
Fair value disclosure
Financial instruments	$ 17,381	$ 18,220
Measurement input	0.057	0.053
Financial Instrument, Measurement Input	us-gaap:MeasurementInputDiscountRateMember	us-gaap:MeasurementInputDiscountRateMember