Receivables (Details) (USD $)	3 Months Ended
	Mar. 26, 2014	Mar. 27, 2013	Dec. 25, 2013
Receivables [Abstract]
Trade accounts receivable from franchisees, gross, current	$ 9,874,000		$ 10,072,000
Notes receivable from franchisees, gross, current	1,532,000		1,800,000
Allowance for doubtful accounts	(234,000)		(231,000)
Total current receivables, net	14,216,000		17,321,000
Noncurrent assets (included as a component of other noncurrent assets):
Notes receivable from franchisees, noncurrent	613,000		766,000
Maximum provision for credit losses	100,000	100,000
Maximum interest income on notes receivable	100,000	100,000
Vendor receivables [Member]
Receivables [Abstract]
Other receivable, gross, current	944,000		2,516,000
Credit card receivables [Member]
Receivables [Abstract]
Other receivable, gross, current	884,000		2,162,000
Other [Member]
Receivables [Abstract]
Other receivable, gross, current	$ 1,216,000		$ 1,002,000