| In millions, except per share items | Mar-31-22 | Dec-31-21 | Mar-31-21 | Dec-31-20 | Mar-31-20 | Dec-31-19 | Mar-31-19 | Dec-31-18 |
| | 8-K | 10-K | 8-K | 10-K | 8-K | 10-K | 8-K | 10-K |
| Revenues: |
| Northwest Natural Gas Company | | 843.1 | | 758.7 | | 739.9 | | 705.6 |
| Parent Company | | 860.4 | | 773.7 | | 746.4 | | 706.1 |
| Natural Gas Distribution | | 816.9 | | 741.1 | | 720.5 | | 680.6 |
| Other Northwest Natural | | 26.2 | | 17.7 | | 19.4 | | 24.9 |
| Total revenues [+] | 856.9 | 828.2 | 301.3 | 744.4 | 278.5 | 746.4 | 701.8 | 706.1 |
| Net interest income | 0.0 | | 0.0 | | 0.0 | | 0.0 | |
| Revenue growth [+] | 184.4% | 11.3% | 8.2% | -0.3% | -60.3% | 5.7% | | -6.5% |
| Northwest Natural Gas Company | | 11.1% | | 2.5% | | 4.9% | | -6.6% |
| Parent Company | | 11.2% | | 3.7% | | 5.7% | | -6.5% |
| Natural Gas Distribution | | 10.2% | | 2.9% | | 5.9% | | -7.1% |
| Other Northwest Natural | | 48.1% | | -9.0% | | -22.1% | | 12.8% |
| Northwest Holdings Other | | 16.2% | | 132.3% | | 1023.8% | | |
| Cost of goods sold [+] | 738.7 | 496.5 | 221.2 | 442.9 | 208.7 | 433.1 | 587.4 | 412.2 |
| Maintenance and operations costs | 209.5 | 204.2 | 52.2 | 180.1 | 48.9 | 178.2 | 168.7 | 156.7 |
| Oil & gas costs | | 292.3 | | 262.8 | | 254.9 | | 255.5 |
| Gross profit | 118.2 | 331.6 | 80.1 | 301.5 | 69.8 | 313.3 | 114.4 | 293.9 |
| Gross margin | 13.8% | 40.0% | 26.6% | 40.5% | 25.1% | 42.0% | 16.3% | 41.6% |
| Selling, general and administrative [+] | 117.8 | 38.6 | 29.0 | 35.1 | 0.9 | 32.4 | 3.3 | 32.2 |
| General and administrative | | 38.6 | | 35.1 | | 32.4 | | 32.2 |
| Other operating expenses | -269.5 | 16.3 | -71.7 | 14.4 | -7.6 | 45.9 | -29.4 | 44.4 |
| EBITDA [+] | 269.9 | 276.7 | 122.8 | 252.0 | | 235.0 | | 217.3 |
| EBITDA growth | 119.8% | 9.8% | 60.6% | 7.3% | -45.6% | 8.1% | | -6.3% |
| EBITDA margin | 31.5% | 33.4% | 40.8% | 33.9% | 27.5% | 31.5% | 20.0% | 30.8% |
| Depreciation and amortization | 113.9 | 113.5 | 28.1 | 103.7 | | 91.5 | | 85.2 |
| EBIT [+] | 156.0 | 163.1 | 94.7 | 148.4 | 76.4 | 143.5 | 140.5 | 132.2 |
| EBIT growth | 64.8% | 10.0% | 23.9% | 3.4% | -45.6% | 8.6% | | -12.4% |
| EBIT margin | 18.2% | 19.7% | 31.4% | 19.9% | 27.5% | 19.2% | 20.0% | 18.7% |
| Interest expense | 44.9 | 44.5 | 11.1 | 43.1 | 10.5 | 42.7 | 38.0 | 37.1 |
| Interest expense | 44.9 | 44.5 | 11.1 | 43.1 | 10.5 | 42.7 | 38.0 | 37.1 |
| Other income (expense), net [+] | -10.0 | -12.6 | -3.5 | -13.9 | -3.6 | -22.8 | -16.5 | -3.6 |
| Environmental remediation expense | | 9.9 | | 9.7 | | 12.3 | | 11.1 |
| Other | -10.0 | -12.6 | -3.5 | -13.9 | -3.6 | -22.8 | -16.5 | 7.5 |
| Pre-tax income | 101.2 | 106.1 | 80.0 | 91.4 | 62.4 | 78.0 | 86.0 | 91.5 |
| Income taxes | 25.8 | 27.4 | 20.5 | 21.1 | 14.1 | 12.6 | 17.2 | 24.2 |
| Tax rate | 25.5% | 25.8% | 25.6% | 23.1% | 22.6% | 16.2% | 20.1% | 26.4% |
| Earnings from continuing ops | 75.4 | 78.7 | 59.5 | 70.3 | 48.3 | 65.3 | 68.7 | 67.3 |
| Earnings from discontinued ops | | | | | -0.8 | | -2.5 | |
| Net income | 75.4 | 78.7 | 59.5 | 76.8 | 47.5 | 61.7 | 66.2 | 64.6 |
| Net margin | 8.8% | 9.5% | 19.8% | 10.3% | 17.1% | 8.3% | 9.4% | 9.1% |
| |
| Basic EPS [+] | $2.44 | $2.56 | $1.94 | $2.30 | $1.59 | $2.19 | $2.38 | $2.34 |
| Growth | 25.8% | 11.4% | 22.4% | 4.9% | -33.3% | -6.2% | | -7.0% |
| Diluted EPS [+] | $2.44 | $2.56 | $1.94 | $2.30 | $1.59 | $2.19 | $2.38 | $2.33 |
| Growth | 25.8% | 11.4% | 22.4% | 5.0% | -33.3% | -6.2% | | -7.0% |
| |
| Dividends per share [+] | $1,925.00 | $1.92 | $480.00 | $1.91 | $477.50 | $1.90 | $1,895.00 | $1.89 |
| Growth | 301.0% | 0.5% | 0.5% | 0.5% | -74.8% | 0.5% | | 0.5% |
| |
| Shares outstanding (basic) [+] | 30.9 | 30.7 | 30.7 | 30.5 | 30.4 | 29.8 | 28.9 | 28.8 |
| Growth | 0.7% | 0.5% | 0.8% | 2.5% | 5.3% | 3.4% | | 0.5% |
| Shares outstanding (diluted) [+] | 30.9 | 30.8 | 30.7 | 30.6 | 30.4 | 29.9 | 28.9 | 28.9 |
| Growth | 0.7% | 0.5% | 0.8% | 2.5% | 5.3% | 3.4% | | 0.4% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |