EMPLOYEE BENEFIT PLANS - Schedule of Multiemployer Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Multiemployer Plans [Line Items]
Total Contributions	$ 1,956	$ 3,412	$ 4,284
SEIU National Industry Pension Fund
Multiemployer Plans [Line Items]
Total Contributions	366	910	845
New England Carpenters Pension Fund
Multiemployer Plans [Line Items]
Total Contributions	91	121	138
Plumbers and Pipefitters Pension Fund
Multiemployer Plans [Line Items]
Total Contributions	171	299	311
Rhode Island Laborers Pension Fund
Multiemployer Plans [Line Items]
Total Contributions	483	785	934
New England Teamsters Pension Fund
Multiemployer Plans [Line Items]
Total Contributions	230	361	582
Legacy And Adjustable Plan Of The UNITE HERE Retirement Fund
Multiemployer Plans [Line Items]
Total Contributions	578	936	1,474
Local 68 Engineers Union Pension Fund
Multiemployer Plans [Line Items]
Total Contributions	22	0	0
Northeast Carpenters Pension Fund
Multiemployer Plans [Line Items]
Total Contributions	10	0	0
International Painters and Allied Trades Industry Pension Fund
Multiemployer Plans [Line Items]
Total Contributions	$ 5	$ 0	$ 0