Segment Information - Geographic Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 2,266,073	$ 2,055,622	$ 2,100,002
Long-lived assets	304,321	295,231	280,224
Reportable Geographical Components [Member] | United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,556,825	1,400,893	1,519,456
Long-lived assets	238,752	223,099	223,398
Reportable Geographical Components [Member] | United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	231,039	197,039	240,823
Long-lived assets	17,661	15,978	19,982
Reportable Geographical Components [Member] | Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	280,140	237,162	97,967
Long-lived assets	21,327	18,928	20,460
Reportable Geographical Components [Member] | Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	121,295	149,875	162,664
Long-lived assets	25,973	36,722	15,863
Reportable Geographical Components [Member] | Mexico [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	76,774	70,653	79,092
Long-lived assets	$ 608	$ 504	$ 521