Fair Value Measurements-Assets Measured At Fair Value on Non-recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Dec. 25, 2013	Dec. 26, 2012
Fair Value Disclosure [Line Items]
Fair Value Of Impaired Long Lived Assets	$ 1,342	$ 140
Fair Value, Inputs, Level 1 [Member]
Fair Value Disclosure [Line Items]
Fair Value Of Impaired Long Lived Assets	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value Disclosure [Line Items]
Fair Value Of Impaired Long Lived Assets	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value Disclosure [Line Items]
Fair Value Of Impaired Long Lived Assets	$ 1,342	$ 140