Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Schedule of Contract with Customer, Asset and Liability

Deferred revenue and customer deposits as of December 31, 2020 and 2019 consists of the following (in thousands):

	December 31,
	2020		2019
Deferred revenue	$	135,578	$	175,619
Customer deposits	66,171		39,101
Deferred revenue and customer deposits	$	201,749	$	214,720

Deferred revenue activity during the years ended December 31, 2020 and 2019 consists of the following (in thousands):

	Years Ended December 31,
	2020		2019
Beginning balance	$	175,619	$	149,612
Additions	652,960		709,843
Revenue recognized	(693,001)		(683,836)
Ending balance	$	135,578	$	175,619

Disaggregation of Revenue

We disaggregate revenue from contracts with customers into four revenue categories: (i) product, (ii) installation, (iii) services, and (iv) electricity (in thousands):

	Years Ended December 31,
	2020		2019		2018
	Under ASC 606		With Adoption of ASC 606		Under ASC 605
Revenue from contracts with customers:
Product revenue	$	518,633	$	557,336	$	400,638
Installation revenue	101,887		60,826		68,195
Services revenue	109,633		95,786		83,267
Electricity revenue	—		10,840		23,023
Total revenue from contract with customers	730,153		724,788		575,123
Revenue from contracts accounted for as leases:
Electricity revenue	64,094		60,389		57,525
Total revenue	$	794,247	$	785,177	$	632,648