Restatement - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended		9 Months Ended	12 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014	Sep. 27, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax expense (benefit)	$ 1,279,000	$ 3,197,000	$ 218,000	$ 5,741,000
Goodwill	$ 157,569,000	157,569,000	$ 157,569,000	157,569,000							$ 157,569,000
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of goods sold					$ (800,000)	$ (900,000)	$ (2,200,000)	$ (300,000)	$ 1,300,000	$ 6,700,000
Income tax expense (benefit)		88,000		403,000		$ (900,000)	$ 0
Goodwill		$ (4,371,000)		$ (4,371,000)				(4,000,000)
Deferred income taxes								(2,700,000)
Goodwill impairment								1,400,000
Deferred tax assets								$ (1,600,000)