Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting, Other Significant Reconciling Item [Line Items]
Number of reportable segments | segment			4
Net Sales	$ 348,389	$ 255,184	$ 635,981	$ 470,585
Total consolidated income from operations	31,409	30,748	44,224	43,525
Total assets	1,186,133		1,186,133		$ 1,212,494
Renewables
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	107,751	55,950	193,263	103,213
Residential
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	164,209	139,472	304,426	242,891
Agtech
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	53,696	42,309	100,435	91,543
Infrastructure
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	22,733	17,453	37,857	32,938
Operating Segments | Discontinued Operations
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	0		0		77,438
Operating Segments | Renewables
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	107,751	55,950	193,263	103,213
Total consolidated income from operations	9,510	8,422	8,989	12,781
Total assets	424,884		424,884		402,796
Operating Segments | Residential
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	164,209	139,472	304,426	242,891
Total consolidated income from operations	27,155	27,964	50,089	41,689
Total assets	443,903		443,903		407,132
Operating Segments | Agtech
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	53,696	42,309	100,435	91,543
Total consolidated income from operations	977	766	1,906	2,106
Total assets	204,264		204,264		216,275
Operating Segments | Infrastructure
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net Sales	22,733	17,453	37,857	32,938
Total consolidated income from operations	4,186	2,801	6,223	4,377
Total assets	86,748		86,748		80,796
Corporate
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total consolidated income from operations	(10,419)	$ (9,205)	(22,983)	$ (17,428)
Total assets	$ 26,334		$ 26,334		$ 28,057