Segments - Schedule of Company's Net Sales From External Customers (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 102,331	$ 128,511	$ 145,130	$ 143,732	$ 91,431	$ 84,338	$ 91,535	$ 87,221	$ 519,704	$ 354,526	$ 313,331
Operating Segments
Segment Reporting Information [Line Items]
Revenues									524,544	358,550	317,824
Intercompany Sales Elimination
Segment Reporting Information [Line Items]
Revenues									(4,839)	(4,024)	(4,493)
Outdoor Sports | Operating Segments
Segment Reporting Information [Line Items]
Revenues									7,181	6,862	7,896
Fabrication | Operating Segments
Segment Reporting Information [Line Items]
Revenues									334,340	147,099	129,387
Performance structures | Operating Segments
Segment Reporting Information [Line Items]
Revenues									71,881	84,231	87,742
Tube | Operating Segments
Segment Reporting Information [Line Items]
Revenues									71,108	80,715	65,440
Tank | Operating Segments
Segment Reporting Information [Line Items]
Revenues									$ 40,033	$ 39,641	$ 27,359