Segment information - Summary of Financial Information for Reportable Segments (Detail) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019 USD ($)	Sep. 28, 2019 USD ($)	Jun. 29, 2019 USD ($)	Mar. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 29, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting Information
Number of Reportable Segments									3
Total net sales	$ 426,998	$ 394,147	$ 378,874	$ 391,047	$ 401,642	$ 398,597	$ 383,059	$ 367,199	$ 1,591,066	$ 1,550,497	$ 1,342,532
Total segment profit									367,898	386,259	313,053
Total assets	2,516,086				2,317,641				2,516,086	2,317,641	1,976,172
Total depreciation and amortization									141,403	127,268	102,231
Total capital expenditures									112,355	110,153	93,597
SCEM
Segment Reporting Information
Total net sales									526,519	530,241	485,470
Total segment profit									98,327	127,080	109,571
Total assets	936,609				757,381				936,609	757,381	749,379
Total depreciation and amortization									75,391	70,329	66,514
Total capital expenditures									57,585	44,337	44,350
MC
Segment Reporting Information
Total net sales									633,664	553,838	436,812
Total segment profit									194,398	166,852	134,439
Total assets	786,131				680,080				786,131	680,080	251,216
Total depreciation and amortization									41,917	33,590	13,744
Total capital expenditures									28,549	38,331	27,178
AMH
Segment Reporting Information
Total net sales									458,290	493,404	444,743
Total segment profit									75,173	92,327	69,043
Total assets	372,849				359,991				372,849	359,991	278,079
Total depreciation and amortization									23,911	22,805	21,003
Total capital expenditures									25,212	26,545	18,378
Inter-segment elimination
Segment Reporting Information
Total net sales									(27,407)	(26,986)	(24,493)
Corporate
Segment Reporting Information
Total assets	$ 420,497				$ 520,189				420,497	520,189	697,498
Total depreciation and amortization									184	544	970
Total capital expenditures									$ 1,009	$ 940	$ 3,691