Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Deferred Revenue (Details)

v3.20.1
Summary of Significant Accounting Policies - Deferred Revenue (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Deferred Revenue Arrangement [Line Items]      
Deferred revenue $ 738,728 $ 729,499 $ 591,600
Customer agreements      
Deferred Revenue Arrangement [Line Items]      
Deferred revenue 606,641 603,504  
Customer agreements | Payments received      
Deferred Revenue Arrangement [Line Items]      
Deferred revenue 560,007 558,630  
Customer agreements | Financing component balance      
Deferred Revenue Arrangement [Line Items]      
Deferred revenue 46,634 44,874  
SREC contracts      
Deferred Revenue Arrangement [Line Items]      
Deferred revenue 132,087 125,995  
SREC contracts | Payments received      
Deferred Revenue Arrangement [Line Items]      
Deferred revenue 127,672 122,680  
SREC contracts | Financing component balance      
Deferred Revenue Arrangement [Line Items]      
Deferred revenue $ 4,415 $ 3,315