Restructuring - Textual (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended	18 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014	Dec. 27, 2014	Jun. 27, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 0	$ 0	$ 58,000	$ 0	$ 2,300,000
Restructuring reserves	424,000	$ 0	424,000	$ 0	997,000	$ 424,000
Employee severance and benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge			45,000			1,100,000
Restructuring reserves	0		0		383,000	0
Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge			13,000			400,000
Restructuring reserves	9,000		9,000		31,000	9,000
Facility termination costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge			0			900,000
Restructuring reserves	$ 415,000		$ 415,000		$ 583,000	$ 415,000