Leases - Lease Income (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 25, 2019	Sep. 25, 2019
Lessor, Lease, Description [Line Items]
Total lease income	$ 10,802	$ 26,629
Restructuring Charges and Exit Costs [Member]
Lessor, Lease, Description [Line Items]
Operating lease income	56	188
Variable lease income	13	37
Franchise [Member]
Lessor, Lease, Description [Line Items]
Operating lease income	7,963	19,234
Variable lease income	$ 2,770	$ 7,170