Business segment data (Tables)

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Information on the Company's businesses

Information on the Company's segments was as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
	(In thousands)
External operating revenues:
Regulated operations:
Electric	$	81,011	$	78,499	$	173,578	$	165,904
Natural gas distribution	133,867		129,540		476,014		462,204
Pipeline and midstream	21,369		18,645		26,272		23,035
	236,247		226,684		675,864		651,143
Nonregulated operations:
Pipeline and midstream	7,311		5,415		11,021		9,858
Construction materials and contracting	595,799		509,388		822,911		722,672
Construction services	464,192		323,020		884,925		657,071
Other	24		90		43		146
	1,067,326		837,913		1,718,900		1,389,747
Total external operating revenues	$	1,303,573	$	1,064,597	$	2,394,764	$	2,040,890

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
	(In thousands)
Intersegment operating revenues:
Regulated operations:
Electric	$	—		$	—		$	—		$	—
Natural gas distribution	—			—			—			—
Pipeline and midstream	7,426			6,446			31,349			28,182
	7,426			6,446			31,349			28,182
Nonregulated operations:
Pipeline and midstream	87			93			119			116
Construction materials and contracting	168			235			264			336
Construction services	721			540			849			550
Other	2,879			2,667			10,704			5,306
	3,855			3,535			11,936			6,308
Intersegment eliminations	(11,281		)	(9,981		)	(43,285		)	(34,490		)
Total intersegment operating revenues	$	—		$	—		$	—		$	—
Operating income (loss):
Electric	$	9,791		$	13,027		$	27,779		$	31,182
Natural gas distribution	(2,621		)	(4,371		)	47,696			44,169
Pipeline and midstream	10,698			8,482			20,602			16,650
Construction materials and contracting	46,178			37,301			4,597			10,992
Construction services	31,966			19,356			59,431			39,990
Other	1,299			197			1,425			385
Total operating income	$	97,311		$	73,992		$	161,530		$	143,368
Net income (loss):
Regulated operations:
Electric	$	7,471		$	9,133		$	22,976		$	22,216
Natural gas distribution	(6,252		)	(6,852		)	30,248			25,771
Pipeline and midstream	6,378			5,240			13,382			10,699
	7,597			7,521			66,606			58,686
Nonregulated operations:
Pipeline and midstream	742			467			579			288
Construction materials and contracting	29,166			24,336			(5,283		)	815
Construction services	22,845			14,088			42,869			29,179
Other	2,795			(2,337		)	(537		)	(2,932		)
	55,548			36,554			37,628			27,350
Income from continuing operations	63,145			44,075			104,234			86,036
Income (loss) from discontinued operations, net of tax	(1,320		)	(273		)	(1,483		)	203
Net income	$	61,825		$	43,802		$	102,751		$	86,239