FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Debt (Details) $ in Thousands	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
New England Teamsters and Trucking Industry Pension Fund | Nonunion Defined Benefit Pension Plan | Asset Based
Fair value disclosure
Outstanding withdrawal liability	$ 20,800
New England Teamsters and Trucking Industry Pension Fund | Nonunion Defined Benefit Pension Plan | Asset Based | Accrued expenses
Fair value disclosure
Outstanding withdrawal liability	700
New England Teamsters and Trucking Industry Pension Fund | Nonunion Defined Benefit Pension Plan | Asset Based | Other long-term liabilities
Fair value disclosure
Outstanding withdrawal liability	20,100
Carrying value
Fair value disclosure
Financial instruments	246,299	$ 305,623
Fair value disclosure
Fair value disclosure
Financial instruments	249,458	312,749
Credit Facility | Carrying value | Level 2
Fair value disclosure
Financial instruments	50,000	70,000
Credit Facility | Fair value disclosure | Level 2
Fair value disclosure
Financial instruments	50,000	70,000
Notes payable | Carrying value | Level 2
Fair value disclosure
Financial instruments	175,530	214,216
Notes payable | Fair value disclosure | Level 2
Fair value disclosure
Financial instruments	$ 175,937	$ 217,226
New England Pension Fund withdrawal liability | Discount Rate
Fair value disclosure
Measurement input	0.031	0.026
New England Pension Fund withdrawal liability | Carrying value | Level 2
Fair value disclosure
Financial instruments	$ 20,769	$ 21,407
New England Pension Fund withdrawal liability | Fair value disclosure | Level 2
Fair value disclosure
Financial instruments	$ 23,521	$ 25,523