Business segment data (Tables)

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Information on the Company's businesses

Information on the Company's segments was as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
	(In thousands)
External operating revenues:
Regulated operations:
Electric	$	89,845	$	86,080	$	263,423	$	251,984
Natural gas distribution	93,642		92,248		569,656		554,452
Pipeline and midstream	25,957		22,289		52,230		45,325
	209,444		200,617		885,309		851,761
Nonregulated operations:
Pipeline and midstream	6,576		6,782		17,597		16,640
Construction materials and contracting	869,376		743,763		1,692,287		1,466,435
Construction services	478,381		329,578		1,363,305		986,649
Other	22		47		65		193
	1,354,355		1,080,170		3,073,254		2,469,917
Total external operating revenues	$	1,563,799	$	1,280,787	$	3,958,563	$	3,321,678

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2019			2018			2019			2018
	(In thousands)
Intersegment operating revenues:
Regulated operations:
Electric	$	—		$	—		$	—		$	—
Natural gas distribution	—			—			—			—
Pipeline and midstream	3,750			3,070			35,098			31,252
	3,750			3,070			35,098			31,252
Nonregulated operations:
Pipeline and midstream	81			117			200			233
Construction materials and contracting	124			165			388			501
Construction services	1,226			782			2,076			1,332
Other	2,862			3,037			13,566			8,343
	4,293			4,101			16,230			10,409
Intersegment eliminations	(8,043		)	(7,171		)	(51,328		)	(41,661		)
Total intersegment operating revenues	$	—		$	—		$	—		$	—
Operating income (loss):
Electric	$	21,930		$	21,140		$	49,708		$	52,321
Natural gas distribution	(15,565		)	(11,665		)	32,132			32,503
Pipeline and midstream	11,416			9,036			32,017			25,687
Construction materials and contracting	143,024			109,598			147,622			120,591
Construction services	29,950			11,863			89,381			51,853
Other	(1,285		)	32			140			417
Total operating income	$	189,470		$	140,004		$	351,000		$	283,372
Net income (loss):
Regulated operations:
Electric	$	16,291		$	15,284		$	39,267		$	37,500
Natural gas distribution	(15,625		)	(11,887		)	14,623			13,884
Pipeline and midstream	6,933			10,109			20,316			20,809
	7,599			13,506			74,206			72,193
Nonregulated operations:
Pipeline and midstream	801			848			1,380			1,136
Construction materials and contracting	102,611			78,876			97,328			79,691
Construction services	21,113			9,278			63,982			38,457
Other	4,004			4,861			3,466			1,928
	128,529			93,863			166,156			121,212
Income from continuing operations	136,128			107,369			240,362			193,405
Income (loss) from discontinued operations, net of tax	1,509			(118		)	26			85
Net income	$	137,637		$	107,251		$	240,388		$	193,490