In millions, except per share items | Mar-31-23 | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 |
| 8-K | 8-K | 8-K | 8-K | 10-K | 8-K | 8-K | 10-K |
Operating revenues: | | | | | | | | |
Regulated operations revenues | | | | | 1,521.8 | | | 1,350.6 |
Utility infrastructure services revenues | | | | | 2,158.7 | | | 1,948.3 |
Total operating revenues | 411.1 | 390.9 | 387.5 | 395.5 | 1,497.8 | 396.0 | 622.2 | 1,339.2 |
Total operating revenues growth | 3.9% | -73.9% | -2.1% | -36.4% | 11.8% | -32.3% | 75.1% | -3.3% |
Operating expenses: | | | | | | | | |
Net cost of gas sold | | | | | 430.9 | | | 342.8 |
Operations and maintenance | | | | | 473.1 | | | 408.1 |
Depreciation and amortization | | | | | 371.0 | | 239.3 | 332.0 |
Taxes other than income taxes | 84.3 | 83.2 | 82.1 | 81.3 | 80.3 | 71.8 | 67.8 | 63.5 |
Utility infrastructure services expenses | | | | | 1,955.5 | | | 1,729.4 |
Total operating expenses | 84.3 | 83.2 | 82.1 | 81.3 | 3,310.9 | 71.8 | 307.0 | 2,875.9 |
Operating income (loss) | 326.8 | 307.7 | 305.5 | 314.2 | 369.5 | 324.3 | 315.2 | 423.0 |
Operating margin | 79.5% | 78.7% | 78.8% | 79.4% | 24.7% | 81.9% | 50.7% | 31.6% |
|
Other income and (expenses): | | | | | | | | |
Net interest deductions | | | | | -119.2 | | | -111.5 |
Other income (deductions) | | | -6.1 | | -3.5 | 5.5 | 14.5 | -6.8 |
Total other income and (expenses) | | | -6.1 | | -122.7 | 5.5 | 14.5 | -118.3 |
Income (loss) before income taxes | | | | | 246.9 | | | 304.7 |
Income tax expense (benefit) | | | 26.4 | | 39.6 | 37.6 | 37.2 | 65.8 |
Net income (loss) | -253.6 | -203.3 | 148.0 | 179.7 | 207.2 | 264.2 | | 239.0 |
Net income attributable to noncontrolling interests | | | | | 6.4 | | | 6.7 |
Net income (loss) attributable to Southwest Gas Holdings, Inc. | | | | | 200.8 | | 277.1 | 232.3 |
|
Earnings (loss) per share: | | | | | | | | |
Basic (in USD per share) | | | | | $3.39 | | $4.90 | $4.15 |
Diluted (in USD per share) | | | | | $3.39 | | $4.89 | $4.14 |
|
Weighted average shares: | | | | | | | | |
Basic (in shares) | 67.4 | 65.6 | 62.0 | 59.9 | 59.1 | 57.3 | 56.6 | 56.0 |
Diluted (in shares) | 67.4 | 65.6 | 62.2 | 60.0 | 59.3 | 57.4 | 56.6 | 56.1 |