COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 25, 2020	Mar. 27, 2019	Dec. 25, 2019	Sep. 30, 2017
Loss Contingencies [Line Items]
Litigation Settlement, Expense		$ 1,200
Loss Contingency Accrual	$ 1,200
Percentage of tax benefits due to equity owners	85.00%
Establishment of liabilities under tax receivable agreement	$ 310	$ 1,636
Tax receivable agreement liability	228,166		$ 234,426
Retail site
Loss Contingencies [Line Items]
Letters of credit outstanding	$ 130
Office building
Loss Contingencies [Line Items]
Letters of credit outstanding				$ 603
Renewal term		1 year