Accounting Policies - Fair Value Measurements (Details) (USD $)	4 Months Ended
	Sep. 18, 2012	Sep. 20, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Impairment of long-lived assets	$ 70,500	$ 0
Two former Frisch's Big Boy restaurants
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Impairment of long-lived assets	70,000
Two former Frisch's Big Boy restaurants | Level 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets held for sale, fair value	0
Two former Frisch's Big Boy restaurants | Level 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets held for sale, fair value	1,622,000
Two former Frisch's Big Boy restaurants | Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets held for sale, fair value	$ 0