Summary of the Results of Operations for Business Segments (Detail) (USD $) In Thousands	3 Months Ended				9 Months Ended
	Oct. 01, 2011		Oct. 02, 2010		Oct. 01, 2011		Oct. 02, 2010		Jan. 01, 2011
Segment Reporting Information [Line Items]
Net sales	$ 218,720	[1]	$ 177,793	[1]	$ 612,147	[1]	$ 511,888	[1]
Income from operations	37,186	[1]	32,011	[1]	103,798	[1]	88,175	[1]
Depreciation and amortization expense	5,334	[1]	3,849	[1]	14,667	[1]	11,656	[1]
Net capital expenditures	1,729	[1]	603	[1]	4,880	[1]	3,008	[1]
Total assets	1,030,367	[1]	866,638	[1]	1,030,367	[1]	866,638	[1]	873,172
Long-lived assets	721,187	[1]	613,345	[1]	721,187	[1]	613,345	[1]
Commercial Foodservice Equipment Group
Segment Reporting Information [Line Items]
Net sales	189,133	[1]	156,081	[1]	521,137	[1]	450,036	[1]
Income from operations	47,875	[1]	38,002	[1]	127,118	[1]	107,042	[1]
Depreciation and amortization expense	3,995	[1]	3,257	[1]	11,886	[1]	10,040	[1]
Net capital expenditures	1,533	[1]	400	[1]	4,327	[1]	2,492	[1]
Total assets	827,276	[1]	709,733	[1]	827,276	[1]	709,733	[1]
Long-lived assets	602,164	[1]	524,905	[1]	602,164	[1]	524,905	[1]
Food Processing Group
Segment Reporting Information [Line Items]
Net sales	29,587	[1]	21,712	[1]	91,010	[1]	61,852	[1]
Income from operations	2,484	[1]	4,040	[1]	13,706	[1]	12,076	[1]
Depreciation and amortization expense	1,106	[1]	438	[1]	2,207	[1]	1,150	[1]
Net capital expenditures	23	[1]	65	[1]	162	[1]	167	[1]
Total assets	139,618	[1]	104,377	[1]	139,618	[1]	104,377	[1]
Long-lived assets	85,263	[1]	58,271	[1]	85,263	[1]	58,271	[1]
Corporate and Other
Segment Reporting Information [Line Items]
Income from operations	(13,173)	[1],[2]	(10,031)	[1],[2]	(37,026)	[1],[2]	(30,943)	[1],[2]
Depreciation and amortization expense	233	[1],[2]	154	[1],[2]	574	[1],[2]	466	[1],[2]
Net capital expenditures	173	[1],[2]	138	[1],[2]	391	[1],[2]	349	[1],[2]
Total assets	63,473	[1],[2]	52,528	[1],[2]	63,473	[1],[2]	52,528	[1],[2]
Long-lived assets	$ 33,760	[1],[2]	$ 30,169	[1],[2]	$ 33,760	[1],[2]	$ 30,169	[1],[2]

[1] Non-operating expenses are not allocated to the operating segments. Non-operating expenses consist of interest expense and deferred financing amortization, foreign exchange gains and losses and other income and expense items outside of income from operations.

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