Revenue from contracts with customers (Tables)

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

In the following tables, revenue is disaggregated by the type of customer or service provided. The Company believes this level of disaggregation best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. The table also includes a reconciliation of the disaggregated revenue by reportable segments. For more information on the Company's business segments, see Note 16.

Three Months Ended June 30, 2020	Electric		Natural gas distribution		Pipeline		Construction materials and contracting		Construction services		Other		Total
	(In thousands)
Residential utility sales	$	27,954	$	78,653	$	—	$	—	$	—	$	—	$	106,607
Commercial utility sales	29,877		41,027		—		—		—		—		70,904
Industrial utility sales	8,072		5,658		—		—		—		—		13,730
Other utility sales	1,591		—		—		—		—		—		1,591
Natural gas transportation	—		10,350		27,965		—		—		—		38,315
Natural gas gathering	—		—		1,181		—		—		—		1,181
Natural gas storage	—		—		3,104		—		—		—		3,104
Contracting services	—		—		—		303,356		—		—		303,356
Construction materials	—		—		—		482,498		—		—		482,498
Intrasegment eliminations	—		—		—		(164,719)		—		—		(164,719)
Inside specialty contracting	—		—		—		—		324,921		—		324,921
Outside specialty contracting	—		—		—		—		160,696		—		160,696
Other	7,717		2,711		3,363		—		412		2,861		17,064
Intersegment eliminations	(196)		(185)		(7,999)		(90)		(779)		(2,973)		(12,222)
Revenues from contracts with customers	75,015		138,214		27,614		621,045		485,250		(112)		1,347,026
Revenues out of scope	1,423		3,280		44		—		11,155		—		15,902
Total external operating revenues	$	76,438	$	141,494	$	27,658	$	621,045	$	496,405	$	(112)	$	1,362,928

Three Months Ended June 30, 2019	Electric		Natural gas distribution		Pipeline		Construction materials and contracting		Construction services		Other		Total
	(In thousands)
Residential utility sales	$	26,437	$	71,010	$	—	$	—	$	—	$	—	$	97,447
Commercial utility sales	33,231		41,250		—		—		—		—		74,481
Industrial utility sales	9,344		5,577		—		—		—		—		14,921
Other utility sales	1,879		—		—		—		—		—		1,879
Natural gas transportation	—		10,706		24,804		—		—		—		35,510
Natural gas gathering	—		—		2,396		—		—		—		2,396
Natural gas storage	—		—		2,623		—		—		—		2,623
Contracting services	—		—		—		297,124		—		—		297,124
Construction materials	—		—		—		444,768		—		—		444,768
Intrasegment eliminations	—		—		—		(145,925)		—		—		(145,925)
Inside specialty contracting	—		—		—		—		319,276		—		319,276
Outside specialty contracting	—		—		—		—		133,288		—		133,288
Other	8,417		2,923		6,293		—		9		2,903		20,545
Intersegment eliminations	—		—		(7,513)		(168)		(721)		(2,879)		(11,281)
Revenues from contracts with customers	79,308		131,466		28,603		595,799		451,852		24		1,287,052
Revenues out of scope	1,703		2,401		77		—		12,340		—		16,521
Total external operating revenues	$	81,011	$	133,867	$	28,680	$	595,799	$	464,192	$	24	$	1,303,573

Six Months Ended June 30, 2020	Electric		Natural gas distribution		Pipeline		Construction materials and contracting		Construction services		Other		Total
	(In thousands)
Residential utility sales	$	60,303	$	265,354	$	—	$	—	$	—	$	—	$	325,657
Commercial utility sales	63,464		156,023		—		—		—		—		219,487
Industrial utility sales	18,439		14,179		—		—		—		—		32,618
Other utility sales	3,239		—		—		—		—		—		3,239
Natural gas transportation	—		22,148		55,397		—		—		—		77,545
Natural gas gathering	—		—		3,271		—		—		—		3,271
Natural gas storage	—		—		6,150		—		—		—		6,150
Contracting services	—		—		—		401,757		—		—		401,757
Construction materials	—		—		—		690,408		—		—		690,408
Intrasegment eliminations	—		—		—		(208,823)		—		—		(208,823)
Inside specialty contracting	—		—		—		—		697,130		—		697,130
Outside specialty contracting	—		—		—		—		290,846		—		290,846
Other	16,167		5,209		6,604		—		763		5,852		34,595
Intersegment eliminations	(391)		(370)		(33,198)		(152)		(3,249)		(5,946)		(43,306)
Revenues from contracts with customers	161,221		462,543		38,224		883,190		985,490		(94)		2,530,574
Revenues out of scope	1,125		5,394		89		—		23,120		—		29,728
Total external operating revenues	$	162,346	$	467,937	$	38,313	$	883,190	$	1,008,610	$	(94)	$	2,560,302

Six Months Ended June 30, 2019	Electric		Natural gas distribution		Pipeline		Construction materials and contracting		Construction services		Other		Total
	(In thousands)
Residential utility sales	$	62,993	$	271,619	$	—	$	—	$	—	$	—	$	334,612
Commercial utility sales	68,902		163,043		—		—		—		—		231,945
Industrial utility sales	18,228		14,188		—		—		—		—		32,416
Other utility sales	3,678		—		—		—		—		—		3,678
Natural gas transportation	—		22,276		49,862		—		—		—		72,138
Natural gas gathering	—		—		4,517		—		—		—		4,517
Natural gas storage	—		—		5,269		—		—		—		5,269
Contracting services	—		—		—		380,164		—		—		380,164
Construction materials	—		—		—		624,077		—		—		624,077
Intrasegment eliminations	—		—		—		(181,066)		—		—		(181,066)
Inside specialty contracting	—		—		—		—		618,805		—		618,805
Outside specialty contracting	—		—		—		—		240,686		—		240,686
Other	17,538		6,836		8,989		—		26		10,747		44,136
Intersegment eliminations	—		—		(31,468)		(264)		(849)		(10,704)		(43,285)
Revenues from contracts with customers	171,339		477,962		37,169		822,911		858,668		43		2,368,092
Revenues out of scope	2,239		(1,948)		124		—		26,257		—		26,672
Total external operating revenues	$	173,578	$	476,014	$	37,293	$	822,911	$	884,925	$	43	$	2,394,764

Contract balances

The changes in contract assets and liabilities were as follows:

	June 30, 2020		December 31, 2019		Change		Location on Consolidated Balance Sheets
	(In thousands)
Contract assets	$	136,514	$	109,078	$	27,436	Receivables, net
Contract liabilities - current	(158,272)		(142,768)		(15,504)		Accounts payable
Contract liabilities - noncurrent	(72)		(19)		(53)		Noncurrent liabilities - other
Net contract liabilities	$	(21,830)	$	(33,709)	$	11,879