Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013		Dec. 29, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 3,389	$ 1,680
Additional goodwill recognized during period	0	1,709	[1]
Impairment losses recognized during the period	0	0
Other changes in the carrying amounts during the period	0	0
Goodwill	3,389	3,389
Goodwill	3,389	3,389		1,680
Accumulated impairment losses	$ 0	$ 0		$ 0

[1] During 2013, the Company recorded goodwill related to the Robertex acquisition.