Segments - Schedule of reporting information by segment (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Net sales		$ 208,453	$ 233,156	$ 424,192	$ 458,642
Total operating income		16,142	22,617	35,099	47,022
Interest expense, net		(1,790)	(1,211)	(3,436)	(2,358)
Income before income taxes		14,352	21,406	31,663	44,664
Operating Segments [Member] | Material Handling [Member]
Segment Reporting Information [Line Items]
Net sales		143,295	173,090	295,857	349,726
Total operating income		24,828	28,034	50,179	59,254
Operating Segments [Member] | Distribution [Member]
Segment Reporting Information [Line Items]
Net sales		65,173	60,075	128,358	108,936
Total operating income	[1]	3,398	4,269	5,635	7,570
Inter-company sales [Member]
Segment Reporting Information [Line Items]
Net sales		(15)	(9)	(23)	(20)
Corporate [Member]
Segment Reporting Information [Line Items]
Total operating income	[1],[2],[3]	$ (12,084)	$ (9,686)	$ (20,715)	$ (19,802)

[1] (2) In the three and six months ended June 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 benefits and $0.3 million was recognized in Corporate related to charges for the acceleration of stock compensation.

[2] (1) The company recognized $1.8 million and $0.6 million of expense to the estimated environmental reserve, net of probable insurance recoveries for the quarters ended June 30, 2023 and 2022, respectively, and $2.3 million and $1.3 million for the six months ended June 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 three and six months ended June 30, 2023.