Segment Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting, Other Significant Reconciling Item [Line Items]
Number of reportable segments | segment	4
Net Sales	$ 287,592	$ 215,401
Total consolidated income from operations	12,815	12,777
Total assets	1,155,191		$ 1,212,494
Renewables
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	85,512	47,263
Residential
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	140,217	103,419
Agtech
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	46,739	49,234
Infrastructure
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	15,124	15,485
Operating Segments | Discontinued Operations
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	0		77,438
Operating Segments | Renewables
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	85,512	47,263
Total consolidated income from operations	(521)	4,359
Total assets	393,499		402,796
Operating Segments | Residential
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	140,217	103,419
Total consolidated income from operations	22,934	13,725
Total assets	427,894		407,132
Operating Segments | Agtech
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	46,739	49,234
Total consolidated income from operations	929	1,340
Total assets	212,507		216,275
Operating Segments | Infrastructure
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	15,124	15,485
Total consolidated income from operations	2,037	1,576
Total assets	82,833		80,796
Corporate
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total consolidated income from operations	(12,564)	$ (8,223)
Total assets	$ 38,458		$ 28,057