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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Debt (Details) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Carrying value
Fair value disclosure
Financial instruments	$ 284,723	$ 246,299
Fair value disclosure
Fair value disclosure
Financial instruments	276,689	249,458
Credit Facility | Carrying value | Level 2
Fair value disclosure
Financial instruments	50,000	50,000
Credit Facility | Fair value disclosure | Level 2
Fair value disclosure
Financial instruments	50,000	50,000
Notes payable | Carrying value | Level 2
Fair value disclosure
Financial instruments	214,623	175,530
Notes payable | Fair value disclosure | Level 2
Fair value disclosure
Financial instruments	207,778	$ 175,937
New England Pension Fund withdrawal liability
Fair value disclosure
Outstanding withdrawal liability	20,100
New England Pension Fund withdrawal liability | Accrued expenses
Fair value disclosure
Outstanding withdrawal liability	700
New England Pension Fund withdrawal liability | Other long-term liabilities
Fair value disclosure
Outstanding withdrawal liability	$ 19,400
New England Pension Fund withdrawal liability | Discount Rate
Fair value disclosure
Measurement input	0.053	0.031
New England Pension Fund withdrawal liability | Carrying value | Level 2
Fair value disclosure
Financial instruments	$ 20,100	$ 20,769
New England Pension Fund withdrawal liability | Fair value disclosure | Level 2
Fair value disclosure
Financial instruments	$ 18,911	$ 23,521

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