Segment Information (Tables)

9 Months Ended

Sep. 30, 2021

Schedule of Accounts Receivable for Services

Accounts receivable for these services, which are not eliminated during consolidation, are presented in the table below:


(Thousands of dollars)	September 30, 2021		December 31, 2020
Centuri accounts receivable for services provided to Southwest	$	15,376	$	13,956

Schedule of Utility Infrastructure Services Assets

Utility infrastructure services total assets increased significantly since December 31, 2020, primarily due to Centuri’s acquisition of Riggs Distler (see Note 8 - Business Acquisitions), as follows:


(Thousands of dollars)	September 30, 2021		December 31, 2020
Centuri segment assets	$	2,671,974	$	1,475,237

Schedule of Segment Reporting Information

The financial information pertaining to the natural gas operations and utility infrastructure services segments is as follows:


(Thousands of dollars)	Natural Gas Operations		Utility Infrastructure Services		Other		Total
Three Months Ended September 30, 2021
Revenues from external customers	$	255,848	$	606,006	$	—	$	861,854
Intersegment revenues	—		26,842		—		26,842
Total	$	255,848	$	632,848	$	—	$	888,696
Segment net income (loss)	$	(27,544)	$	18,540	$	(2,572)	$	(11,576)

Three Months Ended September 30, 2020
Revenues from external customers	$	210,834	$	548,300	$	—	$	759,134
Intersegment revenues	—		32,092		—		32,092
Total	$	210,834	$	580,392	$	—	$	791,226
Segment net income (loss)	$	(15,973)	$	34,873	$	(627)	$	18,273

(Thousands of dollars)	Natural Gas Operations		Utility Infrastructure Services		Other		Total
Nine Months Ended September 30, 2021
Revenues from external customers	$	1,070,576	$	1,450,719	$	—	$	2,521,295
Intersegment revenues	—		74,729		—		74,729
Total	$	1,070,576	$	1,525,448	$	—	$	2,596,024
Segment net income (loss)	$	102,584	$	32,797	$	(4,545)	$	130,836

Nine Months Ended September 30, 2020
Revenues from external customers	$	976,095	$	1,306,481	$	—	$	2,282,576
Intersegment revenues	—		102,217		—		102,217
Total	$	976,095	$	1,408,698	$	—	$	2,384,793
Segment net income (loss)	$	79,568	$	50,936	$	(1,724)	$	128,780


(Thousands of dollars)	Natural Gas Operations		Utility Infrastructure Services		Other		Total
Twelve Months Ended September 30, 2021
Revenues from external customers	$	1,445,066	$	1,957,667	$	—	$	3,402,733
Intersegment revenues	—		107,371		—		107,371
Total	$	1,445,066	$	2,065,038	$	—	$	3,510,104
Segment net income (loss)	$	182,134	$	56,723	$	(4,477)	$	234,380

Twelve Months Ended September 30, 2020
Revenues from external customers	$	1,355,666	$	1,738,430	$	—	$	3,094,096
Intersegment revenues	—		138,834		—		138,834
Total	$	1,355,666	$	1,877,264	$	—	$	3,232,930
Segment net income (loss)	$	155,993	$	66,615	$	(2,110)	$	220,498