Leases (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
Leases [Abstract]
Operating Lease Term Maximum			25 years
Operating Lease, Weighted Average Remaining Lease Term	13 years 6 months 25 days		13 years 6 months 25 days
Finance Lease, Weighted Average Remaining Lease Term	19 years 4 months 13 days		19 years 4 months 13 days
Operating Lease, Weighted Average Discount Rate, Percent	6.41%		6.41%
Finance Lease, Weighted Average Discount Rate, Percent	5.31%		5.31%
Operating lease expense	$ 2,300	$ 2,300	$ 4,500	$ 5,000