Segment Information - Results of Business Segments (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Jan. 02, 2021	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Jan. 02, 2021		Dec. 28, 2019		Dec. 29, 2018
Segment Reporting Information [Line Items]
Net sales		$ 729,296	$ 634,525	$ 471,977	$ 677,459	$ 787,626	$ 724,014	$ 761,004	$ 686,802	$ 2,513,257		$ 2,959,446		$ 2,722,931
Operating Income (Loss)		93,227	$ 86,672	$ 39,118	$ 105,414	152,030	$ 121,345	$ 139,607	$ 101,061	324,431	[1],[2]	514,043	[1],[2]	445,966	[2]
Depreciation										39,086		37,852		35,782
Amortization expense (5)	[3]									71,446		65,576		61,456
Net capital expenditures										34,849		46,609		36,040
Total assets		5,202,474				5,002,143				5,202,474		5,002,143		4,549,781
Long-lived assets (6)	[4]	547,339				499,819				547,339		499,819		383,988
Commercial Foodservice Equipment Group
Segment Reporting Information [Line Items]
Net sales										1,510,279		1,984,345		1,729,814
Operating Income (Loss)	[2]									239,625	[1]	429,946	[1]	393,380
Depreciation										21,768		21,054		17,374
Amortization expense (5)	[3]									51,985		45,906		35,224
Net capital expenditures										25,463		29,353		17,444
Total assets		3,249,441				3,188,304				3,249,441		3,188,304		2,906,373
Long-lived assets (6)	[4]	279,481				261,466				279,481		261,466		181,636
Food Processing Group
Segment Reporting Information [Line Items]
Net sales										437,272		400,951		389,594
Operating Income (Loss)	[2]									78,008	[1]	68,935	[1]	62,435
Depreciation										5,507		4,944		5,207
Amortization expense (5)	[3]									7,319		8,162		7,527
Net capital expenditures										3,427		6,683		7,373
Total assets		617,171				621,619				617,171		621,619		513,189
Long-lived assets (6)	[4]	55,069				57,403				55,069		57,403		33,127
Residential Kitchen
Segment Reporting Information [Line Items]
Net sales										565,706		574,150		603,523
Operating Income (Loss)	[2]									67,046	[1]	89,312	[1]	53,959
Depreciation										11,691		11,742		12,838
Amortization expense (5)	[3]									9,657		9,896		17,226
Net capital expenditures										4,801		9,168		11,721
Total assets		1,221,229				1,157,211				1,221,229		1,157,211		1,089,103
Long-lived assets (6)	[4]	192,940				176,834				192,940		176,834		146,897
Corporate and Other
Segment Reporting Information [Line Items]
Net sales	[5]									0		0		0
Operating Income (Loss)	[2],[5]									(60,248)	[1]	(74,150)	[1]	(63,808)
Depreciation	[5]									120		112		363
Amortization expense (5)	[3],[5]									2,485		1,612		1,479
Net capital expenditures	[5]									1,158		1,405		(498)
Total assets	[5]	114,633				35,009				114,633		35,009		41,116
Long-lived assets (6)	[4],[5]	$ 19,849				$ 4,116				$ 19,849		$ 4,116		$ 22,328

[1] Gain on litigation settlement is included in Residential Kitchen and gain on sale of plant is included in Commercial Foodservice.

[2] Restructuring expenses and impairments are included in operating income of the segment to which they pertain. See note 3(f) and 13 for further details.

[3] Includes amortization of deferred financing costs

[4] Long-lived assets consist of property, plant and equipment, long-term deferred tax assets and other assets.

[5] Includes corporate and other general company assets and operations.