v3.26.1
Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2026
Accounting Policies [Abstract]  
Schedule of Other Property and Investments Other property and investments on Southwest Gas’ and the Company’s Condensed Consolidated Balance Sheets includes:
(Thousands of dollars)June 30, 2026December 31, 2025
Net cash surrender value of COLI policies$168,916 $165,551 
Other property2,274 4,396 
Total Southwest Gas Corporation171,190 169,947 
Other property and investments10,216 8,879 
Total Southwest Gas Holdings, Inc.$181,406 $178,826 
Schedule of Significant Items Included in Other Income (Deductions) The following table provides the composition of significant items included in Other income (deductions) in Southwest Gas’ and the Company’s Condensed Consolidated Statements of Income:
Three Months Ended June 30,Six Months Ended
June 30,
(Thousands of dollars)
2026202520262025
Southwest Gas Corporation:
Change in COLI policies$3,600 $5,500 $3,300 $3,800 
Interest income3,077 5,817 5,731 11,627 
Equity AFUDC2,449 1,558 4,482 2,911 
Other components of net periodic benefit gain2,195 4,368 4,390 8,737 
Miscellaneous income and (expense)(2,901)563 (3,768)33 
Southwest Gas Corporation - total other income (deductions)8,420 17,806 14,135 27,108 
Southwest Gas Holdings, Inc.:
Interest income3,010 329 7,140 364 
Equity in earnings (loss) of unconsolidated investments(97)— 1,097 — 
Miscellaneous income and (expense)(38)(67)(86)(209)
Southwest Gas Holdings, Inc. – total other income (deductions)$11,295 $18,068 $22,286 $27,263 
Schedule of Earnings Per Share, Basic and Diluted A reconciliation of the denominator used in Basic and Diluted EPS calculations is shown in the following table:
Three Months Ended June 30,Six Months Ended
June 30,
(In thousands)2026202520262025
Weighted average basic shares72,516 72,088 72,479 72,050 
Effect of dilutive securities:
Restricted stock units (1)(2)
149 — 138 145 
Weighted average diluted shares72,665 72,088 72,617 72,195 
(1) The number of securities included 136,000 performance stock units during the three months ended June 30, 2026. During the six months ended June 30, 2026 and June 30, 2025, respectively, the number of securities included 121,000 and 124,000 performance stock units, the total of which was derived by assuming that target performance will be achieved during the relevant performance period.
(2) The number of anti-dilutive restricted stock units excluded from the calculation of diluted shares during the three months ended June 30, 2025 is 161,000. The number of anti-dilutive restricted stock units excluded from the calculation of diluted shares on discontinued operations during the six months ended June 30, 2025 is 145,000.