Summary of Results of Operations for Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 584,800	$ 530,297
Income from operations	86,992	92,741
Depreciation and amortization expense	20,024	14,057
Net capital expenditures	16,657	8,276
Total assets	3,426,894	2,943,031	$ 3,339,713
Commercial Foodservice Equipment Group [Member]
Segment Reporting Information [Line Items]
Net sales	359,904	312,249
Income from operations	82,546	80,541
Depreciation and amortization expense	8,000	4,982
Net capital expenditures	5,777	5,985
Total assets	1,724,174	1,359,869
Food Processing Group [Member]
Segment Reporting Information [Line Items]
Net sales	88,572	77,276
Income from operations	10,678	17,989
Depreciation and amortization expense	4,047	1,387
Net capital expenditures	6,496	638
Total assets	484,038	344,307
Residential Kitchen [Member]
Segment Reporting Information [Line Items]
Net sales	136,324	140,772
Income from operations	6,589	10,574
Depreciation and amortization expense	7,509	7,207
Net capital expenditures	4,898	1,282
Total assets	1,178,110	1,200,241
Corporate and Other
Segment Reporting Information [Line Items]
Net sales	0	0
Income from operations	(12,821)	(16,363)
Depreciation and amortization expense	468	481
Net capital expenditures	(514)	371
Total assets	$ 40,572	$ 38,614