Impairment of Long-lived Assets - Assets Held for Sale (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Long Lived Assets Held-for-sale [Line Items]
Impairment of long-lived assets	$ 1,219	$ 761	$ 421
Gain (Loss) on Disposition of Property Plant Equipment	10	(365)	(41)
Impairment of Long-Lived Assets Held-for-use	1,028	761	253
Assets previously held for sale
Long Lived Assets Held-for-sale [Line Items]
Impairment of Long-Lived Assets Held-for-use		200
Building
Long Lived Assets Held-for-sale [Line Items]
Impairment of long-lived assets	600
Gain (Loss) on Disposition of Property Plant Equipment	200
Machinery and Equipment
Long Lived Assets Held-for-sale [Line Items]
Impairment of long-lived assets	500
Gain (Loss) on Disposition of Property Plant Equipment	$ 100