Revenue (Tables)

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Summary of Revenue Disaggregated by Service Type and Contract Type

Southwest’s operating revenues included on the Condensed Consolidated Statements of Income of both the Company and Southwest include revenue from contracts with customers, which is shown below, disaggregated by customer type, in addition to other categories of revenue:

	Three Months Ended March 31,				Twelve Months Ended March 31,
(Thousands of dollars)	2022		2021		2022		2021
Residential	$	514,586	$	403,143	$	1,147,055	$	983,108
Small commercial	123,984		81,398		312,800		220,476
Large commercial	20,161		12,673		64,859		44,639
Industrial/other	9,972		13,770		38,515		33,310
Transportation	26,632		24,536		94,336		88,345
Revenue from contracts with customers	695,335		535,520		1,657,565		1,369,878
Alternative revenue program revenues (deferrals)	(23,499)		(16,373)		6,055		(468)
Other revenues (1)	4,703		2,785		12,777		280
Total Regulated operations revenues	$	676,539	$	521,932	$	1,676,397	$	1,369,690

(1) Amounts include late fees and other miscellaneous revenues, and may also include the impact of certain regulatory mechanisms, such as cost-of-service components in customer rates expected to be returned to customers in future periods. Also includes the impacts of a temporary moratorium on late fees and disconnection for nonpayment during the COVID-19 pandemic.

The following tables display Centuri’s revenue, reflected as Utility infrastructure services revenues on the Condensed Consolidated Statements of Income of the Company, representing revenue from contracts with customers disaggregated by service and contract types:

	Three Months Ended March 31,				Twelve Months Ended March 31,
(Thousands of dollars)	2022		2021		2022		2021
Service Types:
Gas infrastructure services	$	260,682	$	221,837	$	1,341,185	$	1,265,288
Electric power infrastructure services	181,968		93,961		613,209		433,467
Other	81,227		48,177		364,169		280,015
Total Utility infrastructure services revenues	$	523,877	$	363,975	$	2,318,563	$	1,978,770

	Three Months Ended March 31,				Twelve Months Ended March 31,
(Thousands of dollars)	2022		2021		2022		2021
Contract Types:
Master services agreement	$	356,543	$	293,680	$	1,715,841	$	1,520,144
Bid contract	167,334		70,295		602,722		458,626
Total Utility infrastructure services revenues	$	523,877	$	363,975	$	2,318,563	$	1,978,770
Unit price contracts	$	302,523	$	234,449	$	1,437,156	$	1,347,953
Fixed price contracts	86,537		34,594		319,685		164,750
Time and materials contracts	134,817		94,932		561,722		466,067
Total Utility infrastructure services revenues	$	523,877	$	363,975	$	2,318,563	$	1,978,770

MountainWest Regulated operations revenues on the Condensed Consolidated Statements of Income of the Company include revenue from contracts with customers, which is shown below, disaggregated by categories of sales and service activities.

	Three Months Ended March 31,
(Thousands of dollars)	2022
Regulated gas transportation and storage revenues	$	61,977
NGL revenues	1,493
Other revenues	3,479
Revenue from contracts with customers	66,949
Other revenues	44
Total Regulated operations revenues	$	66,993

Summary of Information about Receivables, Revenue Earned on Contracts in Progress in Excess of Billings, Which are Included Within Accounts Receivable, Net of Allowances, and Amounts Billed in Excess of Revenue Earned on Contracts

The following table provides information about contracts receivable and revenue earned on contracts in progress in excess of billings (contract assets), which are both included within Accounts receivable, net of allowances, as well as amounts billed in excess of revenue earned on contracts (contract liabilities), which are included in Other current liabilities as of March 31, 2022 and December 31, 2021 on the Company’s Condensed Consolidated Balance Sheets:

(Thousands of dollars)	March 31, 2022		December 31, 2021
Contracts receivable, net	$	309,876	$	296,005
Revenue earned on contracts in progress in excess of billings	197,620		214,774
Amounts billed in excess of revenue earned on contracts	26,875		11,860

Schedule of Utility Infrastructure Services Contracts Receivable

Utility infrastructure services contracts receivable consists of the following:

(Thousands of dollars)	March 31, 2022		December 31, 2021
Billed on completed contracts and contracts in progress	$	308,798	$	292,770
Other receivables	1,430		3,492
Contracts receivable, gross	310,228		296,262
Allowance for doubtful accounts	(352)		(257)
Contracts receivable, net	$	309,876	$	296,005