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Segment Information (Tables)
 9 Months Ended
Sep. 30, 2019
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment The following table presents summary financial information concerning the reportable segment and other of continuing operations. See Note 18 for information regarding discontinued operations for NW Holdings and NW Natural.
 
 
Three Months Ended September 30,
In thousands
 
NGD
 
Other
(NW Natural)
 
NW Natural
 
Other
(NW Holdings)
 
NW Holdings
2019
 
 
 
 
 
 
 
 
 
 
Operating revenues
 
$
83,063

 
$
4,529

 
$
87,592

 
$
2,725

 
$
90,317

Depreciation and amortization
 
22,830

 
244

 
23,074

 
301

 
23,375

Income (loss) from operations
 
(11,580
)
 
2,761

 
(8,819
)
 
(815
)
 
(9,634
)
Net income (loss) from continuing operations
 
(19,570
)
 
1,982

 
(17,588
)
 
(918
)
 
(18,506
)
Capital expenditures
 
60,596

 
644

 
61,240

 
606

 
61,846

2018
 
 
 
 
 
 
 
 
 
 
Operating revenues
 
$
85,077

 
$
6,150

 
$
91,227

 
$
12

 
91,239

Depreciation and amortization
 
21,127

 
327

 
21,454

 
31

 
21,485

Income (loss) from operations
 
(9,780
)
 
3,499

 
(6,281
)
 
170

 
(6,111
)
Net income (loss) from continuing operations
 
(11,983
)
 
708

 
(11,275
)
 
131

 
(11,144
)
Capital expenditures
 
55,914

 
511

 
56,425

 
—

 
56,425


 
 
Nine Months Ended September 30,
In thousands
 
NGD
 
Other
(NW Natural)
 
NW Natural
 
Other
(NW Holdings)
 
NW Holdings
2019
 
 
 
 
 
 
 
 
 
 
Operating revenues
 
$
480,088

 
$
14,592

 
$
494,680

 
$
4,428

 
$
499,108

Depreciation and amortization
 
66,071

 
750

 
66,821

 
513

 
67,334

Income (loss) from operations
 
75,975

 
9,090

 
85,065

 
(2,556
)
 
82,509

Net income (loss) from continuing operations
 
22,848

 
6,513

 
29,361

 
(2,398
)
 
26,963

Capital expenditures

151,114

 
801

 
151,915

 
1,078

 
152,993

Total assets at September 30, 2019(1)
 
3,101,372

 
48,269

 
3,149,641

 
87,365

 
3,237,006

2018
 
 
 
 
 
 
 
 
 
 
Operating revenues
 
$
461,525

 
$
17,900

 
$
479,425

 
$
16

 
$
479,441

Depreciation and amortization
 
62,436

 
976

 
63,412

 
95

 
63,507

Income from operations
 
59,521

 
10,341

 
69,862

 
47

 
69,909

Net income from continuing operations
 
24,930

 
5,538

 
30,468

 
60

 
30,528

Capital expenditures
 
156,609

 
2,186

 
158,795

 
—

 
158,795

Total assets at September 30, 2018(1)
 
2,972,395

 
51,886

 
3,024,281

 
44,482

 
3,068,763

Total assets at December 31, 2018(1)
 
3,141,969

 
50,767

 
3,192,736

 
36,657

 
3,229,393


(1)
Total assets for NW Holdings exclude assets related to discontinued operations of $14.6 million, $12.6 million, and $13.3 million as of September 30, 2019, September 30, 2018, and December 31, 2018, respectively. Total assets for NW Natural exclude assets related to discontinued operations of $61.3 million as of September 30, 2018.
NGD Margin
The following table presents additional segment information concerning NGD margin:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
In thousands
 
2019
 
2018
 
2019
 
2018
NGD margin calculation:
 
 
 
 
 
 
 
 
NGD distribution revenues
 
$
77,916

 
$
84,965

 
$
472,691

 
$
461,306

Other regulated services
 
5,147

 
112

 
7,397

 
219

Total NGD operating revenues
 
83,063

 
85,077

 
480,088

 
461,525

Less: NGD cost of gas
 
22,659

 
25,593

 
163,335

 
175,864

          Environmental remediation
 
967

 
1,022

 
7,258

 
7,528

Revenue taxes
 
3,534

 
3,522

 
19,956

 
20,731

NGD margin
 
$
55,903

 
$
54,940

 
$
289,539

 
$
257,402