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Condensed Consolidated Statements Of Equity - USD ($)
$ in Thousands
Common Stock [Member]
Capital In Excess Of Par Value [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Total
Balance at Dec. 31, 2023 $ 138,297 $ 4,137,696 $ 1,706,675 $ (86,485) $ 5,896,183
Net income     265,772   265,772
Dividends declared and paid     (1)   (1)
Dividends declared     (83,998)   (83,998)
Issuance of common stock under dividend reinvestment plan 59 3,823     3,882
Repurchase of stock       (2,231) (2,231)
Equity compensation plan 80 (80)      
Exercise of stock options 2 173     175
Stock-based compensation   1,049 73   1,122
Other   (51)   274 223
Balance at Mar. 31, 2024 138,438 4,142,610 1,888,521 (88,442) 6,081,127
Balance at Dec. 31, 2023 138,297 4,137,696 1,706,675 (86,485) 5,896,183
Net income         410,559
Balance at Sep. 30, 2024 138,975 4,186,048 1,943,876 (87,965) 6,180,934
Balance at Mar. 31, 2024 138,438 4,142,610 1,888,521 (88,442) 6,081,127
Net income     75,385   75,385
Dividends declared and paid     (1)   (1)
Issuance of common stock under dividend reinvestment plan 54 3,736     3,790
Repurchase of stock       (1) (1)
Equity compensation plan 12 (12)      
Exercise of stock options 4 244     248
Stock-based compensation   2,751 (189)   2,562
Other   (121)   245 124
Balance at Jun. 30, 2024 138,508 4,149,208 1,963,716 (88,198) 6,163,234
Net income     69,402   69,402
Dividends declared and paid     (89,081)   (89,081)
Issuance of common stock under dividend reinvestment plan 53 3,878     3,931
Issuance of common stock from at-the-market sale agreements 412 31,671     32,083
Repurchase of stock       (2) (2)
Exercise of stock options 2 113     115
Stock-based compensation   1,525 (161)   1,364
Other   (347)   235 (112)
Balance at Sep. 30, 2024 138,975 4,186,048 1,943,876 (87,965) 6,180,934
Balance at Dec. 31, 2024 139,105 4,199,836 1,949,492 (89,624) 6,198,809
Net income     283,789   283,789
Dividends declared and paid     (22)   (22)
Dividends declared     (90,054)   (90,054)
Issuance of common stock under dividend reinvestment plan 52 3,760     3,812
Issuance of common stock from at-the-market sale agreements 813 62,267     63,080
Repurchase of stock       (2,234) (2,234)
Equity compensation plan 78 (78)      
Exercise of stock options 5 337     342
Stock-based compensation   2,592 (185)   2,407
Other   (88)   250 162
Balance at Mar. 31, 2025 140,053 4,268,626 2,143,020 (91,608) 6,460,091
Balance at Dec. 31, 2024 139,105 4,199,836 1,949,492 (89,624) 6,198,809
Net income         483,693
Balance at Sep. 30, 2025 143,195 4,519,304 2,244,995 (91,195) 6,816,299
Balance at Mar. 31, 2025 140,053 4,268,626 2,143,020 (91,608) 6,460,091
Net income     107,827   107,827
Dividends declared and paid     (1,197)   (1,197)
Issuance of common stock under dividend reinvestment plan 53 3,704     3,757
Issuance of common stock from at-the-market sale agreements 1,833 143,663     145,496
Repurchase of stock       (3) (3)
Equity compensation plan 11 (11)      
Exercise of stock options 1 74     75
Stock-based compensation   4,292 (249)   4,043
Other   (108)   221 113
Balance at Jun. 30, 2025 141,951 4,420,240 2,249,401 (91,390) 6,720,202
Net income     92,077   92,077
Dividends declared and paid     (96,159)   (96,159)
Issuance of common stock under dividend reinvestment plan 52 3,846     3,898
Issuance of common stock from at-the-market sale agreements 1,190 90,351     91,541
Repurchase of stock       (38) (38)
Equity compensation plan 1 (1)      
Exercise of stock options 1 91     92
Stock-based compensation   4,922 (324)   4,598
Other   (145)   233 88
Balance at Sep. 30, 2025 $ 143,195 $ 4,519,304 $ 2,244,995 $ (91,195) $ 6,816,299