Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Deferred Revenue (Details)

v3.21.1
Summary of Significant Accounting Policies - Deferred Revenue (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Deferred Revenue Arrangement [Line Items]      
Deferred revenue $ 807,131 $ 799,276 $ 729,500
Customer agreements      
Deferred Revenue Arrangement [Line Items]      
Deferred revenue 669,626 666,741  
Customer agreements | Payments received, net      
Deferred Revenue Arrangement [Line Items]      
Deferred revenue 616,085 614,906  
Customer agreements | Financing component balance      
Deferred Revenue Arrangement [Line Items]      
Deferred revenue 53,541 51,835  
SREC contracts      
Deferred Revenue Arrangement [Line Items]      
Deferred revenue 137,505 132,535  
SREC contracts | Payments received, net      
Deferred Revenue Arrangement [Line Items]      
Deferred revenue 130,603 126,793  
SREC contracts | Financing component balance      
Deferred Revenue Arrangement [Line Items]      
Deferred revenue $ 6,902 $ 5,742