Segments - Schedule of reporting information by segment (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net sales		$ 899,547	$ 761,435	$ 510,369
Total operating income		83,941	49,301	53,550
Interest expense, net		(5,731)	(4,208)	(4,688)
Income before income taxes		78,210	45,093	48,862
Total Assets		542,634	484,549	400,015
Capital Additions, Net		24,292	17,867	13,421
Depreciation and Amortization		21,657	20,885	20,930
Operating Segments [Member] | Material Handling [Member]
Segment Reporting Information [Line Items]
Net sales		647,619	564,068	343,884
Total operating income	[1]	104,079	62,187	55,072
Total Assets		385,722	370,499	292,596
Capital Additions, Net		22,528	17,173	12,207
Depreciation and Amortization		17,814	17,803	17,834
Operating Segments [Member] | Distribution [Member]
Segment Reporting Information [Line Items]
Net sales		251,966	197,427	166,544
Total operating income	[2],[3]	15,862	15,428	12,157
Total Assets		119,652	88,757	80,708
Capital Additions, Net		705	402	931
Depreciation and Amortization		2,889	2,208	2,300
Inter-company sales [Member]
Segment Reporting Information [Line Items]
Net sales		(38)	(60)	(59)
Corporate [Member]
Segment Reporting Information [Line Items]
Total operating income	[2],[4],[5]	(36,000)	(28,314)	(13,679)
Total Assets		37,260	25,293	26,711
Capital Additions, Net		1,059	292
Depreciation and Amortization	[6]	$ 954	$ 874	796
Corporate [Member] | Material Handling [Member]
Segment Reporting Information [Line Items]
Capital Additions, Net				$ 283

[1] In the year ended December 31, 2021, the Company recognized a $1.0 million gain on the sale of a building within the Material Handling Segment as described in Note 6.

[2] In the year ended December 31, 2021, the Company recognized $0.8 million of executive severance, of which $0.5 million was recognized in the Distribution Segment and $0.3 million was recognized in Corporate. This executive severance cost includes $0.5 million of severance and benefits and $0.3 million of charges for acceleration of stock compensation.

[3] In the year ended December 31, 2022, the Company recognized a $0.6 million impairment loss on an investment in a legacy joint venture within the Distribution Segment as described in Note 1.

[4] In the year ended December 31, 2020, the Company recognized an $11.9 million gain related to the sale of the HC notes receivable and the release of a lease guarantee as discussed in Note 1.

[5] The Company recognized $1.4 million, $0.7 million and $0.5 million of expense to the estimated environmental reserve, net of expected insurance recoveries in the years ended December 31, 2022, 2021 and 2020, respectively, as described in Note 9. Environmental charges are not included in segment results and are shown with Corporate.

[6] Corporate depreciation and amortization includes amortization of deferred financing costs of $0.4 million, $0.5 million and $0.4 million in the years ended December 31, 2022, 2021 and 2020, respectively.