Revenue from contracts with customers (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation

In the following table, 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 17.


Year ended December 31, 2020	Electric		Natural gas distribution		Pipeline		Construction materials and contracting		Construction services		Other		Total
	(In thousands)
Residential utility sales	$	122,663	$	476,388	$	—	$	—	$	—	$	—	$	599,051
Commercial utility sales	131,477		277,873		—		—		—		—		409,350
Industrial utility sales	36,744		26,243		—		—		—		—		62,987
Other utility sales	6,634		—		—		—		—		—		6,634
Natural gas transportation	—		45,546		111,686		—		—		—		157,232
Natural gas gathering	—		—		4,865		—		—		—		4,865
Natural gas storage	—		—		14,918		—		—		—		14,918
Contracting services	—		—		—		1,069,665		—		—		1,069,665
Construction materials	—		—		—		1,659,152		—		—		1,659,152
Intrasegment eliminations	—		—		—		(550,815)		—		—		(550,815)
Inside specialty contracting	—		—		—		—		1,397,124		—		1,397,124
Outside specialty contracting	—		—		—		—		649,486		—		649,486
Other	32,452		10,753		12,216		—		1,541		11,903		68,865
Intersegment eliminations	(491)		(534)		(58,531)		(417)		(5,038)		(11,958)		(76,969)
Revenues from contracts with customers	329,479		836,269		85,154		2,177,585		2,043,113		(55)		5,471,545
Revenues out of scope	2,059		11,382		192		—		47,572		—		61,205
Total external operating revenues	$	331,538	$	847,651	$	85,346	$	2,177,585	$	2,090,685	$	(55)	$	5,532,750


Year ended December 31, 2019	Electric		Natural gas distribution		Pipeline		Construction materials and contracting		Construction services		Other		Total
	(In thousands)
Residential utility sales	$	125,369	$	483,452	$	—	$	—	$	—	$	—	$	608,821
Commercial utility sales	141,596		296,835		—		—		—		—		438,431
Industrial utility sales	37,765		26,895		—		—		—		—		64,660
Other utility sales	7,408		—		—		—		—		—		7,408
Natural gas transportation	—		45,449		101,665		—		—		—		147,114
Natural gas gathering	—		—		9,164		—		—		—		9,164
Natural gas storage	—		—		11,708		—		—		—		11,708
Contracting services	—		—		—		1,088,633		—		—		1,088,633
Construction materials	—		—		—		1,627,833		—		—		1,627,833
Intrasegment eliminations	—		—		—		(525,749)		—		—		(525,749)
Inside specialty contracting	—		—		—		—		1,266,196		—		1,266,196
Outside specialty contracting	—		—		—		—		531,882		—		531,882
Other	35,574		12,726		17,687		—		131		16,551		82,669
Intersegment eliminations	—		—		(56,252)		(1,066)		(3,370)		(16,461)		(77,149)
Revenues from contracts with customers	347,712		865,357		83,972		2,189,651		1,794,839		90		5,281,621
Revenues out of scope	4,013		(135)		220		—		51,057		—		55,155
Total external operating revenues	$	351,725	$	865,222	$	84,192	$	2,189,651	$	1,845,896	$	90	$	5,336,776


Year ended December 31, 2018	Electric		Natural gas distribution		Pipeline		Construction materials and contracting		Construction services		Other		Total
	(In thousands)
Residential utility sales	$	121,477	$	457,959	$	—	$	—	$	—	$	—	$	579,436
Commercial utility sales	136,236		276,716		—		—		—		—		412,952
Industrial utility sales	34,353		24,603		—		—		—		—		58,956
Other utility sales	7,556		—		—		—		—		—		7,556
Natural gas transportation	—		43,238		89,159		—		—		—		132,397
Natural gas gathering	—		—		9,159		—		—		—		9,159
Natural gas storage	—		—		11,543		—		—		—		11,543
Contracting services	—		—		—		968,755		—		—		968,755
Construction materials	—		—		—		1,423,068		—		—		1,423,068
Intrasegment eliminations	—		—		—		(465,969)		—		—		(465,969)
Inside specialty contracting	—		—		—		—		926,875		—		926,875
Outside specialty contracting	—		—		—		—		392,544		—		392,544
Other	31,568		14,579		18,865		—		525		11,259		76,796
Intersegment eliminations	—		—		(50,905)		(669)		(1,681)		(11,052)		(64,307)
Revenues from contracts with customers	331,190		817,095		77,821		1,925,185		1,318,263		207		4,469,761
Revenues out of scope	3,933		6,152		197		—		51,509		—		61,791
Total external operating revenues	$	335,123	$	823,247	$	78,018	$	1,925,185	$	1,369,772	$	207	$	4,531,552

Contract balances

The changes in contract assets and liabilities were as follows:


	December 31, 2020		December 31, 2019		Change		Location on Consolidated Balance Sheets
	(In thousands)
Contract assets	$	104,345	$	109,078	$	(4,733)	Receivables, net
Contract liabilities - current	(158,603)		(142,768)		(15,835)		Accounts payable
Contract liabilities - noncurrent	(52)		(19)		(33)		Noncurrent liabilities - other
Net contract liabilities	$	(54,310)	$	(33,709)	$	(20,601)


	December 31, 2019		December 31, 2018		Change		Location on Consolidated Balance Sheets
	(In thousands)
Contract assets	$	109,078	$	104,239	$	4,839	Receivables, net
Contract liabilities - current	(142,768)		(93,901)		(48,867)		Accounts payable
Contract liabilities - noncurrent	(19)		(135)		116		Noncurrent liabilities - other
Net contract assets (liabilities)	$	(33,709)	$	10,203	$	(43,912)