FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Debt (Details) $ in Thousands	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair value disclosure
Outstanding withdrawal liability	$ 19,800
Accrued expenses
Fair value disclosure
Outstanding withdrawal liability	700
Carrying Value
Fair value disclosure
Financial instruments	252,742	$ 284,723
Fair Value
Fair value disclosure
Financial instruments	247,216	276,689
Credit Facility | Carrying Value | Level 2
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 | Level 2
Fair value disclosure
Financial instruments	182,987	214,623
Notes payable | Fair Value | Level 2
Fair value disclosure
Financial instruments	$ 178,490	$ 207,778
New England Pension Fund withdrawal liability | Discount Rate
Fair value disclosure
Measurement input	0.052	0.053
New England Pension Fund withdrawal liability | Carrying Value | Level 2
Fair value disclosure
Financial instruments	$ 19,755	$ 20,100
New England Pension Fund withdrawal liability | Fair Value | Level 2
Fair value disclosure
Financial instruments	$ 18,726	$ 18,911