Segments - Schedule of reporting information by segment (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Net sales		$ 197,798	$ 228,065	$ 621,990	$ 686,707
Total operating income		18,703	19,897	53,802	66,919
Interest expense, net		(1,539)	(1,719)	(4,975)	(4,077)
Income before income taxes		17,164	18,178	48,827	62,842
Operating Segments [Member] | Material Handling [Member]
Segment Reporting Information [Line Items]
Net sales		132,484	155,658	428,341	505,384
Total operating income		19,978	23,962	70,157	83,216
Operating Segments [Member] | Distribution [Member]
Segment Reporting Information [Line Items]
Net sales		65,335	72,416	193,693	181,352
Total operating income	[1]	4,993	4,899	10,628	12,469
Inter-company sales [Member]
Segment Reporting Information [Line Items]
Net sales		(21)	(9)	(44)	(29)
Corporate [Member]
Segment Reporting Information [Line Items]
Total operating income	[1],[2],[3]	$ (6,268)	$ (8,964)	$ (26,983)	$ (28,766)

[1] (1) In the nine months ended September 30, 2023, the company recognized $0.7 million of executive severance, of which $0.4 million was recognized in the Distribution Segment related to severance and $0.3 million was recognized in Corporate related to charges for the acceleration of stock compensation

[2] (2) The company recognized $(0.1) million and $1.5 million of expense (income) from changes to the estimated environmental reserve, net of probable insurance recoveries for the quarters ended September 30, 2023 and 2022, respectively, and $2.2 million and $2.8 million for the nine months ended September 30, 2023 and 2022, respectively, as described in Note 10. Environmental charges are not included in segment results and are shown with Corporate.

[3] (3) Corporate includes $1.3 million of consulting costs to improve the Company's capabilities to screen and execute large acquisitions in the nine months ended September 30, 2023.