Operating Segments and Geographic Information - Schedule of Revenue from External Customers and Long-Lived Assets Based on Physical Location (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Percent of total revenues									100.00%	100.00%	100.00%
Long-lived assets	$ 395,833				$ 402,529				$ 395,833	$ 402,529	$ 348,068
Total Segment Revenues	655,390	$ 655,774	$ 668,639	$ 605,565	604,884	$ 621,745	$ 610,633	$ 551,381	$ 2,585,368	$ 2,388,643	$ 2,356,672
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Percent of total revenues									51.00%	53.00%	55.00%
Long-lived assets	189,211				231,938				$ 189,211	$ 231,938	$ 193,263
Total Segment Revenues									$ 1,324,653	$ 1,265,455	$ 1,283,925
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Percent of total revenues									7.00%	7.00%	7.00%
Long-lived assets	32,312				33,806				$ 32,312	$ 33,806	$ 31,278
Total Segment Revenues									$ 174,727	$ 167,605	$ 159,985
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Percent of total revenues									5.00%	5.00%	5.00%
Long-lived assets	37,227				34,774				$ 37,227	$ 34,774	$ 30,487
Total Segment Revenues									$ 132,544	$ 121,600	$ 114,605
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Percent of total revenues									5.00%	5.00%	4.00%
Long-lived assets	39,870				38,029				$ 39,870	$ 38,029	$ 32,386
Total Segment Revenues									$ 117,598	$ 113,990	$ 104,214
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Percent of total revenues									32.00%	30.00%	29.00%
Long-lived assets	$ 97,213				$ 63,982				$ 97,213	$ 63,982	$ 60,654
Total Segment Revenues									$ 835,846	$ 719,993	$ 693,943