Revenue from Contracts with Customers (Tables)

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

The following table presents our revenue disaggregated by line of business and reportable segment for the year ended December 31, 2022:


	US Regions		U.S. Federal		Canada		Alternative Fuels		All Other		Total
Project revenue	$	1,049,465	$	333,846	$	44,273	$	—	$	53,680	$	1,481,264
O&M revenue	22,217		51,857		42		10,377		472		84,965
Energy assets	47,372		5,822		4,447		104,082		368		162,091
Integrated-PV	—		—		—		—		49,696		49,696
Other	4,289		366		9,796		—		31,955		46,406
Total revenues	$	1,123,343	$	391,891	$	58,558	$	114,459	$	136,171	$	1,824,422

The following table presents our revenue disaggregated by line of business and reportable segment for the year ended December 31, 2021:


	US Regions		U.S. Federal		Canada		Alternative Fuels		All Other		Total
Project revenue	$	488,507	$	340,686	$	36,776	$	—	$	37,991	$	903,960
O&M revenue	21,551		47,072		71		9,288		631		78,613
Energy assets	39,433		4,913		4,532		101,811		562		151,251
Integrated-PV	—		—		—		—		41,202		41,202
Other	1,627		277		8,104		124		30,539		40,671
Total revenues	$	551,118	$	392,948	$	49,483	$	111,223	$	110,925	$	1,215,697

The following table presents our revenue disaggregated by line of business and reportable segment for the year ended December 31, 2020:


	US Regions		U.S. Federal		Canada		Alternative Fuels		All Other		Total
Project revenue	$	369,341	$	327,626	$	36,689	$	—	$	30,950	$	764,606
O&M revenue	18,633		45,423		169		7,848		289		72,362
Energy assets	33,792		4,358		4,069		75,168		810		118,197
Integrated-PV	—		—		—		—		39,112		39,112
Other	1,888		475		6,830		612		28,193		37,998
Total revenues	$	423,654	$	377,882	$	47,757	$	83,628	$	99,354	$	1,032,275

See Note 16 for our revenue disaggregated by geographical region.

The following table presents information related to our revenue recognized over time:


	Year Ended December 31,
	2022		2021		2020
Percentage of revenue recognized over time	96	%	95	%	94	%

Summary of Contract Balances

The following table provides information about receivables, contract assets, and contract liabilities from contracts with customers:


	December 31, 2022		December 31, 2021
Accounts receivable, net	$	174,009	$	161,970
Accounts receivable retainage	38,057		43,067
Contract Assets
Costs and estimated earnings in excess of billings	576,363		306,172
Contract Liabilities
Billings in excess of cost and estimated earnings	34,796		35,918
Billings in excess of cost and estimated earnings, non-current (1)	7,617		6,481
Total contract liabilities	$	42,413	$	42,399

(1) Performance obligations that are expected to be completed beyond the next twelve months and are included in other liabilities in the consolidated balance sheets.

Summary of Project Development Costs on Projects Converted to Customer Contracts

The following table presents information related to our project development costs recognized in the consolidated statements of income on projects that converted to customer contracts:


	Year Ended December 31,
	2022		2021		2020
Project development costs recognized	$	15,507	$	12,737	$	12,790