STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
| Regulated Operating Revenue | $ 244,640 | $ 248,563 | $ 1,046,095 | $ 1,200,123 |
| Cost of natural gas | 40,485 | 49,607 | 329,134 | 497,271 |
| Operating expenses | ||||
| Operations and maintenance | 100,285 | 100,486 | 308,641 | 310,243 |
| Depreciation and amortization | 47,998 | 45,471 | 142,898 | 134,260 |
| General taxes | 15,193 | 14,222 | 46,931 | 45,062 |
| Total operating expenses | 163,476 | 160,179 | 498,470 | 489,565 |
| Operating income | 40,679 | 38,777 | 218,491 | 213,287 |
| Other expense, net | 198 | (1,397) | (3,196) | (1,833) |
| Interest expense, net | (15,542) | (15,783) | (47,078) | (46,968) |
| Income before income taxes | 25,335 | 21,597 | 168,217 | 164,486 |
| Income taxes | (4,256) | (4,140) | (30,136) | (28,899) |
| Net income | $ 21,079 | $ 17,457 | $ 138,081 | $ 135,587 |
| Earnings per share | ||||
| Basic | $ 0.40 | $ 0.33 | $ 2.60 | $ 2.56 |
| Diluted | $ 0.39 | $ 0.33 | $ 2.59 | $ 2.55 |
| Weighted Average Number of Shares Outstanding, Basic [Abstract] | ||||
| Basic | 53,190 | 52,933 | 53,084 | 52,883 |
| Weighted Average Number of Shares Outstanding, Diluted [Abstract] | ||||
| Diluted | 53,408 | 53,267 | 53,313 | 53,229 |
| Dividends declared per share of stock | $ 0.54 | $ 0.50 | $ 1.62 | $ 1.50 |
| Retained Earnings [Member] | ||||
| Operating expenses | ||||
| Net income | $ 21,079 | $ 17,457 | ||