Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 25, 2012	Dec. 27, 2011
Reconciliation of the beginning and ending liability for unrecognized tax benefits
Balance at the beginning of the period	$ 124	$ 124
Additions to tax positions related to prior years	145	91
Reductions due to statute expiration		(91)
Reductions due to exam settlement	(87)
Balance at the end of the period	182	124
Uncertain tax positions impacting tax rate
Reconciliation of the beginning and ending liability for unrecognized tax benefits
Balance at the beginning of the period	124	124
Additions to tax positions related to prior years	145	91
Reductions due to statute expiration		(91)
Reductions due to exam settlement	(87)
Balance at the end of the period	$ 182	$ 124