Segments - Schedule of reporting information by segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 761,435	$ 510,369	$ 515,698
Total operating income	49,301	53,550	37,266
Interest expense, net	(4,208)	(4,688)	(4,083)
Income from continuing operations before income taxes	45,093	48,862	33,183
Total Assets	484,549	400,015	353,139
Capital Additions, Net	17,867	13,421	10,294
Depreciation and Amortization	20,885	20,930	23,583
Operating Segments [Member] | Material Handling [Member]
Segment Reporting Information [Line Items]
Net sales	564,068	343,884	356,407
Total operating income	62,187	55,072	53,144
Total Assets	370,499	292,596	193,751
Capital Additions, Net	17,173	12,207	8,835
Depreciation and Amortization	17,803	17,834	21,282
Operating Segments [Member] | Distribution [Member]
Segment Reporting Information [Line Items]
Net sales	197,427	166,544	159,349
Total operating income	15,428	12,157	10,076
Total Assets	88,757	80,708	75,338
Capital Additions, Net	402	931	1,396
Depreciation and Amortization	2,208	2,300	1,501
Inter-company sales [Member]
Segment Reporting Information [Line Items]
Net sales	(60)	(59)	(58)
Corporate [Member]
Segment Reporting Information [Line Items]
Total operating income	(28,314)	(13,679)	(25,954)
Total Assets	25,293	26,711	84,050
Capital Additions, Net	292	283	63
Depreciation and Amortization	$ 874	$ 796	$ 800