Income Taxes Schedule of Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 30, 2012	Jan. 01, 2012
Income Tax Disclosure [Abstract]
Inventory and other reserves	$ (486)	$ (44)
Accrued vacation benefits	1,733	2,788
Accrued settlement costs	981	0
Other accruals	422	740
Current deferred income tax assets	2,650	3,484
Less: Valuation allowance	(208)	0
Total current deferred income tax assets	2,442	3,484
Deferred income on sale-leaseback of certain real estate	7,305	13,977
Lease financing obligations	198	1,095
Postretirement benefit expenses	1,452	1,533
Accumulated other comprehensive income-postretirement benefits	(414)	(736)
Stock-based compensation expense	329	1,566
Property and equipment depreciation	1,058	(4,562)
Federal net operating loss carryforwards	7,042	0
State net operating loss carryforwards	2,063	921
Amortization of other intangibles, net	2,856	(87)
Amortization of franchise rights	(24,771)	(24,630)
Occupancy costs	4,452	5,705
Tax credit carryforwards	984	1,693
Other	1,523	2,194
Long-term net deferred income tax assets (liabilities)	4,077
Deferred Tax Liabilities, Net, Noncurrent		(1,331)
Less: Valuation allowance	(1,855)	(903)
Total long-term deferred income tax assets (liabilities)	(2,222)	0
Deferred Tax Liabilities, Net of Valuation Allowance, Noncurrent	0	(2,234)
Carrying value of net deferred income tax assets	$ 4,664	$ 1,250