Revenue Recognition - Schedule of Disaggregation of Revenue by Product Category (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation Of Revenue [Line Items]
Net sales	$ 120,213	$ 62,582	$ 232,833	$ 171,187
Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	121,459	63,652	235,634	173,526
Intercompany Sales Elimination
Disaggregation Of Revenue [Line Items]
Net sales	(1,246)	(1,070)	(2,801)	(2,339)
Outdoor Sports | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	3,006	1,592	5,677	3,363
Fabrication | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	78,318	43,224	147,689	113,016
Performance structures | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	18,753	7,152	39,208	23,791
Tube | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	15,760	9,320	30,647	24,274
Tank | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	$ 5,622	$ 2,364	$ 12,413	$ 9,082