Receivables (Details) (USD $) In Thousands, unless otherwise specified	Jun. 25, 2014	Dec. 25, 2013
Receivables [Abstract]
Trade accounts receivable from franchisees, gross, current	$ 9,563	$ 10,072
Notes receivable from franchisees, gross, current	1,472	1,800
Allowance for doubtful accounts	(235)	(231)
Total current receivables, net	13,998	17,321
Noncurrent assets (included as a component of other noncurrent assets):
Notes receivable from franchisees, noncurrent	535	766
Vendor receivables [Member]
Receivables [Abstract]
Other receivable, gross, current	1,155	2,516
Credit card receivables [Member]
Receivables [Abstract]
Other receivable, gross, current	894	2,162
Other [Member]
Receivables [Abstract]
Other receivable, gross, current	$ 1,149	$ 1,002