INCOME TAXES - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 25, 2020	Mar. 27, 2019	Dec. 25, 2019
Income Tax Contingency [Line Items]
Effective income tax rate reconciliation (in percentage)	(8.80%)	36.20%
Ownership percentage, weighted average	91.60%	79.70%
Deferred tax asset recognized as a result of investment in partnership	$ 851,000
Deferred tax asset related to additional tax basis	87,000
Uncertain tax positions	$ 0
Percentage of tax benefits due to equity owners	85.00%
Percentage of tax benefits expected to be realized	15.00%
Consolidated Entity, Ownership By Parent, LLC Units Acquired	28,195
Establishment of liabilities under tax receivable agreement	$ 310,000	$ 1,636,000
Tax receivable agreement payments to related parties	6,569,000	$ 707,000
Liabilities under tax receivable agreement	228,166,000		$ 234,426,000
Current portion of liabilities under tax receivable agreement	1,207,000		$ 7,777,000
Current Liabilities
Income Tax Contingency [Line Items]
Current portion of liabilities under tax receivable agreement	$ 1,207,000
Limited Liability Company
Income Tax Contingency [Line Items]
Units acquired during the period (in shares)	106,098
Deferred tax asset, investment in partnership	$ 178,207,000