Revenue Recognition - Revenue by Source (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Product revenue	$ 906,858	$ 731,224	$ 724,788
Total revenue	972,176	794,247	785,177
Product
Disaggregation of Revenue [Line Items]
Product revenue	663,512	518,633	557,336
Total revenue	663,512	518,633	557,336
Installation
Disaggregation of Revenue [Line Items]
Product revenue	96,059	101,887	60,826
Total revenue	96,059	101,887	60,826
Service
Disaggregation of Revenue [Line Items]
Product revenue	144,184	109,633	95,786
Total revenue	144,184	109,633	95,786
Electricity
Disaggregation of Revenue [Line Items]
Product revenue	3,103	1,071	10,840
Electricity revenue	65,318	63,023	60,389
Total revenue	$ 68,421	$ 64,094	$ 71,229