Condensed Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands |
Total |
Common Stock |
Capital in Excess of Par Value |
Retained Earnings |
Accumulated Other Comprehensive (Loss) Income |
| Beginning balance at Dec. 31, 2024 |
$ 1,568,247
|
$ 294
|
$ 540,412
|
$ 1,162,114
|
$ (134,573)
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
| Net Income (Loss) |
(69,277)
|
|
|
(69,277)
|
|
| Actuarially Determined Long-Term Liability Adjustments |
378
|
|
|
|
378
|
| Investments in Available-for-Sale Securities |
(301)
|
|
|
|
(301)
|
| Comprehensive Income (Loss) |
(69,200)
|
|
|
(69,277)
|
77
|
| Issuance of Common Stock |
0
|
3
|
(3)
|
|
|
| Merger with Arch |
2,481,368
|
243
|
2,481,125
|
|
|
| Repurchases of Common Stock |
(101,259)
|
(14)
|
(25,296)
|
(75,949)
|
|
| Employee Stock-Based Compensation |
36,094
|
|
36,094
|
|
|
| Shares Withheld for Taxes |
(14,068)
|
|
(14,068)
|
|
|
| Dividends on Common Shares |
(5,364)
|
|
|
(5,364)
|
|
| Dividend Equivalents Earned on Stock-Based Compensation Awards |
(44)
|
|
|
(44)
|
|
| Ending balance at Mar. 31, 2025 |
3,895,774
|
526
|
3,018,264
|
1,011,480
|
(134,496)
|
| Beginning balance at Dec. 31, 2024 |
1,568,247
|
294
|
540,412
|
1,162,114
|
(134,573)
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
| Net Income (Loss) |
(74,235)
|
|
|
|
|
| Actuarially Determined Long-Term Liability Adjustments |
1,134
|
|
|
|
|
| Investments in Available-for-Sale Securities |
569
|
|
|
|
|
| Comprehensive Income (Loss) |
(72,532)
|
|
|
|
|
| Ending balance at Sep. 30, 2025 |
3,778,794
|
512
|
2,991,513
|
919,639
|
(132,870)
|
| Beginning balance at Mar. 31, 2025 |
3,895,774
|
526
|
3,018,264
|
1,011,480
|
(134,496)
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
| Net Income (Loss) |
(36,556)
|
|
|
(36,556)
|
|
| Actuarially Determined Long-Term Liability Adjustments |
378
|
|
|
|
378
|
| Investments in Available-for-Sale Securities |
464
|
|
|
|
464
|
| Comprehensive Income (Loss) |
(35,714)
|
|
|
(36,556)
|
842
|
| Repurchases of Common Stock |
(81,893)
|
(11)
|
(21,597)
|
(60,285)
|
|
| Excise Tax on Repurchases of Common Stock |
(1,245)
|
|
|
(1,245)
|
|
| Employee Stock-Based Compensation |
(4,067)
|
|
(4,067)
|
|
|
| Dividends on Common Shares |
(5,223)
|
|
|
(5,223)
|
|
| Dividend Equivalents Earned on Stock-Based Compensation Awards |
(46)
|
|
|
(46)
|
|
| Ending balance at Jun. 30, 2025 |
3,767,586
|
515
|
2,992,600
|
908,125
|
(133,654)
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
| Net Income (Loss) |
31,598
|
|
|
31,598
|
|
| Actuarially Determined Long-Term Liability Adjustments |
378
|
|
|
|
378
|
| Investments in Available-for-Sale Securities |
406
|
|
|
|
406
|
| Comprehensive Income (Loss) |
32,382
|
|
|
31,598
|
784
|
| Repurchases of Common Stock |
(19,439)
|
(3)
|
(5,003)
|
(14,433)
|
|
| Excise Tax on Repurchases of Common Stock |
(523)
|
|
|
(523)
|
|
| Employee Stock-Based Compensation |
3,916
|
|
3,916
|
|
|
| Dividends on Common Shares |
(5,128)
|
|
|
(5,128)
|
|
| Ending balance at Sep. 30, 2025 |
3,778,794
|
512
|
2,991,513
|
919,639
|
(132,870)
|
| Beginning balance at Dec. 31, 2025 |
3,678,234
|
510
|
2,982,077
|
818,476
|
(122,829)
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
| Net Income (Loss) |
21,044
|
|
|
21,044
|
|
| Actuarially Determined Long-Term Liability Adjustments |
652
|
|
|
|
652
|
| Investments in Available-for-Sale Securities |
(157)
|
|
|
|
(157)
|
| Comprehensive Income (Loss) |
21,539
|
|
|
21,044
|
495
|
| Issuance of Common Stock |
0
|
1
|
(1)
|
|
|
| Repurchases of Common Stock |
(41,923)
|
(5)
|
(8,538)
|
(33,380)
|
|
| Excise Tax on Repurchases of Common Stock |
(366)
|
|
|
(366)
|
|
| Employee Stock-Based Compensation |
6,176
|
|
6,176
|
|
|
| Shares Withheld for Taxes |
(1,646)
|
|
(1,646)
|
|
|
| Dividends on Common Shares |
(5,083)
|
|
|
(5,083)
|
|
| Dividend Equivalents Earned on Stock-Based Compensation Awards |
(39)
|
|
|
(39)
|
|
| Ending balance at Mar. 31, 2026 |
3,656,892
|
506
|
2,978,068
|
800,652
|
(122,334)
|
| Beginning balance at Dec. 31, 2025 |
3,678,234
|
510
|
2,982,077
|
818,476
|
(122,829)
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
| Net Income (Loss) |
156,509
|
|
|
|
|
| Actuarially Determined Long-Term Liability Adjustments |
1,955
|
|
|
|
|
| Investments in Available-for-Sale Securities |
816
|
|
|
|
|
| Comprehensive Income (Loss) |
159,280
|
|
|
|
|
| Ending balance at Sep. 30, 2026 |
3,640,272
|
489
|
2,952,569
|
807,272
|
(120,058)
|
| Beginning balance at Mar. 31, 2026 |
3,656,892
|
506
|
2,978,068
|
800,652
|
(122,334)
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
| Net Income (Loss) |
126,467
|
|
|
126,467
|
|
| Actuarially Determined Long-Term Liability Adjustments |
651
|
|
|
|
651
|
| Investments in Available-for-Sale Securities |
1,157
|
|
|
|
1,157
|
| Comprehensive Income (Loss) |
128,275
|
|
|
126,467
|
1,808
|
| Repurchases of Common Stock |
(63,020)
|
(8)
|
(13,229)
|
(49,783)
|
|
| Excise Tax on Repurchases of Common Stock |
(630)
|
|
|
(630)
|
|
| Employee Stock-Based Compensation |
2,459
|
|
2,459
|
|
|
| Shares Withheld for Taxes |
(32)
|
|
(32)
|
|
|
| Dividends on Common Shares |
(5,021)
|
|
|
(5,021)
|
|
| Dividend Equivalents Earned on Stock-Based Compensation Awards |
(46)
|
|
|
(46)
|
|
| Ending balance at Jun. 30, 2026 |
3,718,877
|
498
|
2,967,266
|
871,639
|
(120,526)
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
| Net Income (Loss) |
8,998
|
|
|
8,998
|
|
| Actuarially Determined Long-Term Liability Adjustments |
652
|
|
|
|
652
|
| Investments in Available-for-Sale Securities |
(184)
|
|
|
|
(184)
|
| Comprehensive Income (Loss) |
9,466
|
|
|
8,998
|
468
|
| Repurchases of Common Stock |
(84,651)
|
(9)
|
(17,101)
|
(67,541)
|
|
| Excise Tax on Repurchases of Common Stock |
(848)
|
|
|
(848)
|
|
| Employee Stock-Based Compensation |
2,404
|
|
2,404
|
|
|
| Dividends on Common Shares |
(4,932)
|
|
|
(4,932)
|
|
| Dividend Equivalents Earned on Stock-Based Compensation Awards |
(44)
|
|
|
(44)
|
|
| Ending balance at Sep. 30, 2026 |
$ 3,640,272
|
$ 489
|
$ 2,952,569
|
$ 807,272
|
$ (120,058)
|