| Mar'20 | Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 |
|---|---|---|---|---|---|---|---|---|
Operating revenues [Abstract] | ||||||||
Operating revenues | ||||||||
285,151 | 247,264 | 90,317 | 123,443 | 285,348 | 226,702 | 91,239 | 124,567 | 263,635 |
Operating expenses: | ||||||||
Cost of gas | ||||||||
108,538 | 91,744 | 22,603 | 35,107 | 105,457 | 79,822 | 25,538 | 42,053 | 108,106 |
Operations and maintenance | ||||||||
48,921 | 46,337 | 40,886 | 39,486 | 51,482 | 41,578 | 37,569 | 38,028 | 39,523 |
Environmental Remediation Expense | ||||||||
4,005 | 5,079 | 967 | -2,656 | 8,947 | 3,599 | 1,022 | 1,882 | 4,624 |
General taxes | ||||||||
9,895 | 7,489 | 7,993 | 7,879 | 9,027 | 7,380 | 7,589 | 7,729 | 9,474 |
Excise Taxes | ||||||||
11,743 | - | - | - | 11,926 | - | - | - | - |
Revenue taxes | ||||||||
- | - | 3,534 | 4,496 | - | 9,351 | 3,522 | 4,780 | 12,429 |
Depreciation and amortization | ||||||||
24,675 | 24,162 | 23,375 | 22,387 | 21,572 | 21,649 | 21,485 | 21,147 | 20,875 |
Other operating expenses | ||||||||
928 | 1,119 | 593 | 646 | 892 | 1,070 | 625 | 679 | 853 |
Total operating expenses | ||||||||
208,705 | 186,299 | 99,951 | 107,345 | 209,303 | 164,449 | 97,350 | 116,298 | 195,884 |
Income from operations | ||||||||
76,446 | 60,965 | -9,634 | 16,098 | 76,045 | 62,253 | -6,111 | 8,269 | 67,751 |
Other income (expense), net | ||||||||
-3,575 | -4,054 | -2,267 | -2,768 | -13,747 | -2,462 | -312 | 7 | -834 |
Interest expense, net | ||||||||
-10,468 | -10,878 | -10,948 | -10,654 | -10,205 | -10,008 | -9,006 | -8,771 | -9,274 |
Income before income taxes | ||||||||
62,403 | 46,033 | -22,849 | 2,676 | 52,093 | 49,783 | -15,429 | -495 | 57,643 |
Income tax expense | ||||||||
14,127 | 7,685 | -4,343 | 625 | 8,675 | 13,000 | -4,285 | -156 | 15,632 |
Net income from continuing operations | ||||||||
48,276 | 38,348 | -18,506 | 2,051 | 43,418 | 36,783 | -11,144 | -339 | 42,011 |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | ||||||||
-778 | -1,608 | -795 | -956 | -217 | -959 | -650 | -659 | -474 |
Net Income (Loss) Attributable to Parent | ||||||||
47,498 | 36,740 | -19,301 | 1,095 | 43,201 | 35,824 | -11,794 | -998 | 41,537 |
Other comprehensive income: | ||||||||
Amortization of non-qualified employee benefit plan liability, net of taxes | ||||||||
160 | 132 | 114 | 115 | 115 | 313 | 154 | 153 | 154 |
Comprehensive income | ||||||||
47,658 | 34,217 | -19,187 | 1,210 | 43,316 | 36,613 | -11,640 | -845 | 41,691 |
Average common shares outstanding: | ||||||||
Basic (in shares) | ||||||||
30,491 | 30,472 | 30,429 | 29,337 | 28,906 | 28,853 | 28,815 | 28,791 | 28,753 |
Diluted (in shares) | ||||||||
30,535 | 30,643 | 30,429 | 29,394 | 28,970 | 29,083 | 28,815 | 28,791 | 28,803 |
Earnings from continuing operations per share of common stock: | ||||||||
Basic (in dollars per share) | ||||||||
1.58 | 1.23 | -0.61 | 0.07 | 1.50 | 1.28 | -0.39 | -0.01 | 1.46 |
Diluted (in dollars per share) | ||||||||
1.58 | 1.23 | -0.61 | 0.07 | 1.50 | 1.27 | -0.39 | -0.01 | 1.46 |
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share [Abstract] | ||||||||
Basic (in dollars per share) | ||||||||
-0.02 | - | -0.02 | - | -0.01 | - | -0.02 | - | - |
Diluted (in dollars per share) | ||||||||
-0.02 | - | -0.02 | - | -0.01 | - | -0.02 | - | - |
Earnings Per Share [Abstract] | ||||||||
Basic (in dollars per share) | ||||||||
1.56 | 1.17 | -0.63 | 0.04 | 1.49 | 1.24 | -0.41 | -0.03 | 1.44 |
Diluted (in dollars per share) | ||||||||
1.56 | 1.17 | -0.63 | 0.04 | 1.49 | 1.24 | -0.41 | -0.03 | 1.44 |
Northwest Natural Gas Company [Member] | ||||||||
Operating revenues | ||||||||
282,529 | 245,264 | 87,592 | 122,242 | 284,846 | 226,146 | 91,227 | 124,563 | 263,635 |
Cost of gas | ||||||||
108,595 | 91,800 | 22,659 | 35,163 | 105,513 | 79,879 | 25,593 | 42,107 | 108,164 |
Operations and maintenance | ||||||||
46,256 | 43,655 | 37,710 | 37,292 | 50,434 | 40,117 | 37,709 | 37,899 | 39,500 |
Environmental Remediation Expense | ||||||||
4,005 | 5,079 | 967 | -2,656 | 8,947 | 3,599 | 1,022 | 1,882 | 4,624 |
General taxes | ||||||||
9,799 | 7,380 | 7,881 | 7,826 | 8,988 | 7,322 | 7,584 | 7,721 | 9,459 |
Excise Taxes | ||||||||
11,743 | - | - | - | 11,926 | - | - | - | - |
Revenue taxes | ||||||||
- | - | 3,534 | 4,496 | - | 9,351 | 3,522 | 4,780 | 12,429 |
Depreciation and amortization | ||||||||
24,190 | 23,584 | 23,074 | 22,243 | 21,504 | 21,574 | 21,454 | 21,090 | 20,868 |
Other operating expenses | ||||||||
920 | 1,116 | 586 | 638 | 890 | 1,067 | 624 | 679 | 853 |
Total operating expenses | ||||||||
205,508 | 182,983 | 96,411 | 105,002 | 208,202 | 162,909 | 97,508 | 116,158 | 195,897 |
Income from operations | ||||||||
77,021 | 62,281 | -8,819 | 17,240 | 76,644 | 63,237 | -6,281 | 8,405 | 67,738 |
Other income (expense), net | ||||||||
-3,563 | -4,063 | -2,323 | -2,814 | -13,768 | -2,431 | -320 | -33 | -815 |
Interest expense, net | ||||||||
-9,861 | -10,360 | -10,459 | -10,387 | -10,133 | -9,940 | -9,007 | -8,771 | -9,274 |
Income before income taxes | ||||||||
63,597 | 47,858 | -21,601 | 4,039 | 52,743 | 50,866 | -15,608 | -399 | 57,649 |
Income tax expense | ||||||||
14,418 | 8,245 | -4,013 | 985 | 8,848 | 13,285 | -4,333 | -128 | 15,635 |
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent | ||||||||
- | - | -17,588 | 3,054 | - | 37,581 | -11,275 | -271 | 42,014 |
Loss from discontinued operations, net of tax | ||||||||
- | - | 0 | 0 | - | 0 | -519 | -727 | -477 |
Net Income (Loss) Attributable to Parent | ||||||||
49,179 | 39,613 | -17,588 | 3,054 | 43,895 | 37,581 | -11,794 | -998 | 41,537 |
Amortization of non-qualified employee benefit plan liability, net of taxes | ||||||||
160 | 132 | 114 | 115 | 115 | 313 | 154 | 153 | 154 |
Comprehensive income | ||||||||
49,339 | 37,090 | -17,474 | 3,169 | 44,010 | 38,370 | -11,640 | -845 | 41,691 |