Segment Information (Measurements Used by Management to Assess Performance of Segments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales:	$ 1,339,783	$ 1,032,578	$ 898,233
Income from operations:	96,988	107,190	80,812
Depreciation and amortization	31,966	20,915	17,557
Total assets	1,214,901	1,212,494	984,450
Capital expenditures	17,705	13,068	8,776
Discontinued Operations
Segment Reporting, Other Significant Reconciling Item [Line Items]
Total assets	0	77,438	92,854
Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Income from operations:	133,959	142,401	117,033
Unallocated Corporate Expenses
Segment Reporting, Other Significant Reconciling Item [Line Items]
Income from operations:	(36,971)	(35,211)	(36,221)
Depreciation and amortization	219	300	390
Total assets	21,246	28,057	174,475
Capital expenditures	3,869	7,101	581
Renewables
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales:	432,096	238,107	229,755
Renewables | Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales:	432,096	238,107	229,755
Income from operations:	20,158	30,105	24,788
Depreciation and amortization	14,682	3,377	3,480
Total assets	445,486	402,797	127,856
Capital expenditures	4,268	423	252
Residential
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales:	635,505	522,814	461,630
Residential | Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales:	635,505	522,814	461,630
Income from operations:	105,821	94,430	63,047
Depreciation and amortization	8,694	8,110	7,906
Total assets	453,469	407,132	359,657
Capital expenditures	4,182	3,313	4,968
Agtech
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales:	199,161	209,460	143,268
Agtech | Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales:	199,161	209,460	143,268
Income from operations:	(931)	10,633	22,770
Depreciation and amortization	5,279	6,068	2,652
Total assets	212,038	216,274	118,997
Capital expenditures	3,289	720	1,947
Infrastructure
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales:	73,021	62,197	63,580
Infrastructure | Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net sales:	73,021	62,197	63,580
Income from operations:	8,911	7,233	6,428
Depreciation and amortization	3,092	3,060	3,129
Total assets	82,662	80,796	110,611
Capital expenditures	$ 2,097	$ 1,511	$ 1,028