Business Segments - Summary of Net Sales and Results of Operations and Total Assets by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Oct. 01, 2017	Jun. 25, 2017	Mar. 26, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 25, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
NET SALES	$ 378,823	$ 347,612	$ 388,944	$ 386,448	$ 361,803	$ 331,404	$ 240,628	$ 174,220	$ 1,501,827	$ 1,108,055	$ 732,677
Income from operations	19,213	$ 7,688	$ 31,270	$ 27,634	13,814	$ 5,758	$ (1,998)	$ 3,944	85,805	21,518	54,602
Depreciation and Amortization									95,056	69,335	34,261
Capital Expenditures									77,697	70,937	39,575
Property, plant, and equipment, net	532,767				536,686				532,767	536,686
Goodwill and intangibles	459,803				508,278				459,803	508,278
Total assets	1,451,616				1,551,252				1,451,616	1,551,252
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
NET SALES									800,383	732,418	732,677
Income from operations									29,702	9,808	54,602
Depreciation and Amortization									33,588	35,931	34,261
Capital Expenditures									37,476	47,493	$ 39,575
Property, plant, and equipment, net	249,791				245,178				249,791	245,178
Total assets	484,682				519,192				484,682	519,192
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
NET SALES									701,444	375,637
Income from operations									56,103	11,710
Depreciation and Amortization									61,468	33,404
Capital Expenditures									40,221	23,444
Property, plant, and equipment, net	282,976				291,508				282,976	291,508
Goodwill and intangibles	459,803				508,278				459,803	508,278
Total assets	$ 966,934				$ 1,032,060				$ 966,934	$ 1,032,060