Business Segment and Geographical Information - Revenues and Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Revenue
Revenue	$ 786,579	$ 635,028	$ 704,644
Income Before Provision for Income Taxes
Total operating income	116,710	81,124	87,823
Interest expense, net	(4,554)	(7,242)	(12,542)
Other expense, net	(104)	(195)	(6,359)
Income Before Provision for Income Taxes	112,052	73,687	68,922
Total Assets
Total assets	1,132,212	927,571	939,387
Depreciation and Amortization
Depreciation and amortization	34,302	31,334	32,390
Capital Expenditures
Capital expenditures	12,771	7,595	9,957
Geographical Information
Long-lived assets	107,989	84,642	86,032
United States
Revenue
Revenue	328,456	286,015	309,957
Geographical Information
Long-lived assets	43,418	40,293	42,094
China
Revenue
Revenue	82,121	51,003	66,480
Geographical Information
Long-lived assets	6,613	9,844	10,319
Canada
Revenue
Revenue	79,426	62,059	64,010
Geographical Information
Long-lived assets	8,460	7,221	7,948
Germany
Revenue
Revenue	37,178	23,292	29,076
Geographical Information
Long-lived assets	25,188	6,051	5,925
France
Revenue
Revenue	28,258	19,725	21,054
Other
Revenue
Revenue	231,140	192,934	214,067
Geographical Information
Long-lived assets	16,963	13,220	12,786
Finland
Geographical Information
Long-lived assets	7,347	8,013	6,960
Operating Segments | Flow Control
Revenue
Revenue	288,788	225,444	250,339
Income Before Provision for Income Taxes
Total operating income	65,509	51,530	55,343
Total Assets
Total assets	382,379	263,141	262,320
Depreciation and Amortization
Depreciation and amortization	8,366	6,333	6,603
Capital Expenditures
Capital expenditures	4,128	2,808	2,639
Operating Segments | Industrial Processing
Revenue
Revenue	328,762	261,577	301,948
Income Before Provision for Income Taxes
Total operating income	66,569	42,971	49,599
Total Assets
Total assets	405,575	379,965	375,194
Depreciation and Amortization
Depreciation and amortization	13,467	13,163	13,012
Capital Expenditures
Capital expenditures	6,412	3,123	5,113
Operating Segments | Material Handling
Revenue
Revenue	169,029	148,007	152,357
Income Before Provision for Income Taxes
Total operating income	17,543	14,375	11,600
Total Assets
Total assets	334,785	273,909	281,057
Depreciation and Amortization
Depreciation and amortization	12,341	11,628	12,528
Capital Expenditures
Capital expenditures	2,211	1,539	2,144
Corporate
Income Before Provision for Income Taxes
Total operating income	(32,911)	(27,752)	(28,719)
Total Assets
Total assets	9,473	10,556	20,816
Depreciation and Amortization
Depreciation and amortization	128	210	247
Capital Expenditures
Capital expenditures	$ 20	$ 125	$ 61