Restructuring and Asset Impairment - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jun. 25, 2016	Jul. 01, 2017	Jun. 25, 2016	Apr. 01, 2017	Dec. 31, 2016	Mar. 26, 2016	Dec. 26, 2015
Restructuring Cost and Reserve [Line Items]
Severance and retention costs liability	$ 4,004	$ 3,678	$ 4,004	$ 3,678	$ 3,451	$ 3,680	$ 2,521	$ 2,969
Accelerated depreciation		$ 200		$ 400
Impairment charges			200
Other restructuring costs	100		400
Accrued Compensation
Restructuring Cost and Reserve [Line Items]
Severance and retention costs liability	$ 4,000		$ 4,000