Leases - Other Information (Details) $ in Thousands	12 Months Ended
	Dec. 26, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Financing cash flows from finance leases	$ 2,544
Operating cash flows from finance leases	1,247
Operating cash flows from operating leases	25,226
Right of use assets obtained in exchange for new lease obligations:
Finance lease liabilities	1,726
Operating lease liabilities, including from acquisitions	$ 180,103