Net Sales Summary (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Segment Reporting Information [Line Items]
Net sales	$ 584,800	$ 530,297
Percent	100.00%	100.00%
Commercial Foodservice Equipment Group [Member]
Segment Reporting Information [Line Items]
Net sales	$ 359,904	$ 312,249
Percent	61.50%	58.90%
Food Processing Group [Member]
Segment Reporting Information [Line Items]
Net sales	$ 88,572	$ 77,276
Percent	15.20%	14.60%
Residential Kitchen [Member]
Segment Reporting Information [Line Items]
Net sales	$ 136,324	$ 140,772
Percent	23.30%	26.50%