LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Cash flows included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 8,503	$ 6,974
Operating cash flows from finance leases	328	340
Finance cash flows from finance leases	942	1,572
Non-cash leases activity:
Right-of-use lease assets obtained in exchange for new operating lease liabilities	25,968	25,407
Right-of-use lease assets obtained in exchange for new finance lease liabilities	$ 86	$ 593