Revenue (Tables)

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Summary of Revenue Disaggregated by Service Type and Contract Type

Gas operating revenues 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, and various categories of revenue:

	Three Months Ended June 30,				Six Months Ended June 30,				Twelve Months Ended June 30,
(Thousands of dollars)	2020		2019		2020		2019		2020		2019
Residential	$	181,298	$	164,873	$	559,853	$	582,101	$	950,540	$	958,008
Small commercial	41,455		50,184		123,918		139,794		233,241		251,281
Large commercial	9,979		11,123		22,646		25,085		46,496		49,703
Industrial/other	6,499		5,413		13,201		11,891		23,384		23,379
Transportation	19,835		21,815		44,241		46,717		89,904		88,934
Revenue from contracts with customers	259,066		253,408		763,859		805,588		1,343,565		1,371,305
Alternative revenue program revenues (deferrals)	4,111		3,392		346		(31,153)		6,387		(22,776)
Other revenues (1)	(743)		1,911		1,056		4,953		4,860		18,595
Total Gas operating revenues	$	262,434	$	258,711	$	765,261	$	779,388	$	1,354,812	$	1,367,124

(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 current customer rates that are expected to be returned to customers in future periods.

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 June 30,				Six Months Ended June 30,				Twelve Months Ended June 30,
(Thousands of dollars)	2020		2019		2020		2019		2020		2019
Service Types:
Gas infrastructure services	$	330,157	$	323,817	$	547,866	$	521,709	$	1,265,131	$	1,205,197
Electric power infrastructure services	95,286		61,366		167,606		113,667		301,656		136,900
Other	69,370		69,117		112,834		131,786		245,335		292,129
Total Utility infrastructure services revenues	$	494,813	$	454,300	$	828,306	$	767,162	$	1,812,122	$	1,634,226

	Three Months Ended June 30,				Six Months Ended June 30,				Twelve Months Ended June 30,
(Thousands of dollars)	2020		2019		2020		2019		2020		2019
Contract Types:
Master services agreement	$	375,502	$	375,860	$	639,047	$	611,515	$	1,410,909	$	1,229,388
Bid contract	119,311		78,440		189,259		155,647		401,213		404,838
Total Utility infrastructure services revenues	$	494,813	$	454,300	$	828,306	$	767,162	$	1,812,122	$	1,634,226
Unit price contracts	$	365,253	$	355,487	$	608,389	$	591,172	$	1,397,473	$	1,323,034
Fixed price contracts	36,011		4,426		63,556		42,965		133,515		107,697
Time and materials contracts	93,549		94,387		156,361		133,025		281,134		203,495
Total Utility infrastructure services revenues	$	494,813	$	454,300	$	828,306	$	767,162	$	1,812,122	$	1,634,226

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 asset), which are both included within Accounts receivable, net of allowances, as well as amounts billed in excess of revenue earned on contracts (contract liability), which are included in Other current liabilities as of June 30, 2020 and December 31, 2019 on the Company’s Condensed Consolidated Balance Sheets:

(Thousands of dollars)	June 30, 2020		December 31, 2019
Contracts receivable, net	$	240,917	$	223,904
Revenue earned on contracts in progress in excess of billings	145,414		99,399
Amounts billed in excess of revenue earned on contracts	6,633		4,525

Schedule of Construction Services Contracts Receivable

Utility infrastructure services contracts receivable consists of the following:

(Thousands of dollars)	June 30, 2020		December 31, 2019
Billed on completed contracts and contracts in progress	$	235,971	$	216,268
Other receivables	5,389		8,456
Contracts receivable, gross	241,360		224,724
Allowance for doubtful accounts	(443)		(820)
Contracts receivable, net	$	240,917	$	223,904