Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

The following table presents summary financial information concerning the reportable segments of our continuing operations. See Note 15 for information regarding our discontinued operation, Gill Ranch Storage.

	Three Months Ended June 30,
In thousands	Utility			Other		Total
2018
Operating revenues	$	118,515		$	6,052	$	124,567
Depreciation and amortization	20,766			381		21,147
Income from operations	4,545			3,724		8,269
Net income (loss) from continuing operations	(2,970		)	2,631		(339		)
Capital expenditures	43,801			1,239		45,040
2017
Operating revenues	$	130,095		$	4,381	$	134,476
Depreciation and amortization	19,894			330		20,224
Income from operations	13,158			3,277		16,435
Net income from continuing operations	2,137			1,938		4,075
Capital expenditures	54,265			1,142		55,407

	Six Months Ended June 30,
In thousands	Utility		Other		Total
2018
Operating revenues	$	376,448	$	11,754	$	388,202
Depreciation and amortization	41,309		713		42,022
Income from operations	69,301		6,719		76,020
Net income from continuing operations	36,913		4,759		41,672
Capital expenditures	100,695		1,675		102,370
Total assets at June 30, 2018(1)	2,907,724		66,293		2,974,017
2017
Operating revenues	$	422,821	$	7,379	$	430,200
Depreciation and amortization	39,518		659		40,177
Income from operations	90,285		5,231		95,516
Net income from continuing operations	42,329		3,143		45,472
Capital expenditures	93,119		1,214		94,333
Total assets at June 30, 2017(1)	2,792,011		66,139		2,858,150
Total assets at December 31, 2017(1)	2,961,326		64,546		3,025,872

Utility Margin

The following table presents additional segment information concerning utility margin:

	Three Months Ended June 30,				Six Months Ended June 30,
In thousands	2018		2017		2018		2017
Utility margin calculation:
Utility operating revenues	$	118,515	$	130,095	$	376,448	$	422,821
Less: Utility cost of gas	42,107		53,005		150,271		196,616
Environmental remediation expense	1,882		2,611		6,506		9,565
Revenue taxes(1)	4,780		—		17,209		—
Utility margin	$	69,746	$	74,479	$	202,462	$	216,640

⁽¹⁾  The change in presentation of revenue taxes was a result of the adoption of ASU 2014-09 "Revenue From Contracts with Customers" and all related amendments on January 1, 2018. This change had no impact on utility margin results as revenue taxes were previously presented net in utility operating revenue. For additional information, see Note 2.