Exit Activity Costs and Asset Impairments (Summary of Exit Activity Costs and Asset Impairments by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Asset impairment charges	$ 1,193	$ 0
Exit activity costs (recoveries), net	4,047	293
Total	5,240	293
Renewables
Restructuring Cost and Reserve [Line Items]
Asset impairment charges	1,193	0
Exit activity costs (recoveries), net	3,778	18
Total	4,971	18
Residential
Restructuring Cost and Reserve [Line Items]
Asset impairment charges	0	0
Exit activity costs (recoveries), net	65	221
Total	65	221
Agtech
Restructuring Cost and Reserve [Line Items]
Asset impairment charges	0	0
Exit activity costs (recoveries), net	204	0
Total	204	0
Infrastructure
Restructuring Cost and Reserve [Line Items]
Asset impairment charges	0	0
Exit activity costs (recoveries), net	0	0
Total	0	0
Corporate
Restructuring Cost and Reserve [Line Items]
Asset impairment charges	0	0
Exit activity costs (recoveries), net	0	54
Total	$ 0	$ 54