Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2018	Dec. 27, 2017	Dec. 28, 2016
Supplemental Cash Flow Information [Abstract]
Income taxes paid, net	$ 3,254	$ 6,367	$ 3,012
Interest paid	19,447	14,636	11,288
Noncash investing and financing activities:
Notes received in connection with disposition of property	0	1,750	0
Property acquisition payable	0	500	0
Accrued purchase of property	178	531	1,445
Insurance proceeds receivable	653	364	0
Issuance of common stock, pursuant to share-based compensation plans	4,671	4,961	3,597
Execution of capital leases	3,623	6,573	9,597
Treasury stock payable	$ 72	$ 120	$ 313