Receivables (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 25, 2020	Dec. 25, 2019
Receivables, net:
Trade accounts receivable from franchisees	$ 8,669	$ 14,551
Financing receivables from franchisees	1,819	2,230
Receivables in connection with disposition of property	2,291	0
Allowance for doubtful accounts	(1,249)	(274)
Total receivables, net	15,136	27,488
Other noncurrent assets:
Financing receivables from franchisees	248	364
Additional bad debt expense	1,000
Vendor receivables
Receivables, net:
Other receivables, gross, current	1,198	3,260
Credit card receivables
Receivables, net:
Other receivables, gross, current	85	6,806
Other
Receivables, net:
Other receivables, gross, current	$ 2,323	$ 915