| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Preferred Shares | | Common Shares | | Treasury Shares | | Add'l Paid in Capital (Deficit) | | Accumulated Earnings | | Accumulated Other Comprehensive Income (Loss) | | | | Total Equity |
| Shares | | Amount | | Shares | | Amount | | Shares | | Amount | | | | | |
| Balance as of December 31, 2021 | 29,200,000 | | | $ | 730,000 | | | 81,295,366 | | | $ | 813 | | | 15,429,499 | | | $ | (522,360) | | | $ | 904,224 | | | $ | 2,000,854 | | | $ | (48,819) | | | | | $ | 3,064,712 | |
| Share-based compensation | — | | | — | | | 198,367 | | | 2 | | | — | | | — | | | 12,510 | | | — | | | — | | | | | 12,512 | |
| Treasury shares acquired | — | | | — | | | — | | | — | | | 9,065,286 | | | (555,199) | | | — | | | — | | | — | | | | | (555,199) | |
| Share repurchase to settle shareholder tax obligations | — | | | — | | | (110,709) | | | (1) | | | — | | | — | | | (6,823) | | | — | | | — | | | | | (6,824) | |
| Net income (loss) | — | | | — | | | — | | | — | | | — | | | — | | | — | | | 746,922 | | | — | | | | | 746,922 | |
| Other comprehensive income (loss) | — | | | — | | | — | | | — | | | — | | | — | | | — | | | — | | | 158,088 | | | | | 158,088 | |
Common shares dividend declared ($2.65 per share) | — | | | — | | | — | | | — | | | — | | | — | | | — | | | (163,736) | | | — | | | | | (163,736) | |
| Preferred shares dividend declared | — | | | — | | | — | | | — | | | — | | | — | | | — | | | (52,112) | | | — | | | | | (52,112) | |
| Balance as of December 31, 2022 | 29,200,000 | | | $ | 730,000 | | | 81,383,024 | | | $ | 814 | | | 24,494,785 | | | $ | (1,077,559) | | | $ | 909,911 | | | $ | 2,531,928 | | | $ | 109,269 | | | | | $ | 3,204,363 | |
| Share-based compensation expense | — | | | — | | | 138,727 | | | 1 | | | — | | | — | | | 7,304 | | | — | | | — | | | | | 7,305 | |
| Treasury shares acquired | — | | | — | | | — | | | — | | | 1,884,616 | | | (125,661) | | | — | | | — | | | — | | | | | (125,661) | |
| Share repurchase to settle shareholder tax obligations | — | | | — | | | (81,190) | | | (1) | | | — | | | — | | | (5,802) | | | — | | | — | | | | | (5,803) | |
| Net income (loss) | — | | | — | | | — | | | — | | | — | | | — | | | — | | | 474,089 | | | — | | | | | 474,089 | |
| Other comprehensive income (loss) | — | | | — | | | — | | | — | | | — | | | — | | | — | | | — | | | (23,700) | | | | | (23,700) | |
| Reclassification of share-based awards to a liability | — | | | — | | | — | | | — | | | — | | | — | | | (16,109) | | | — | | | — | | | | | (16,109) | |
| Return of capital to Parent | — | | | — | | | — | | | — | | | — | | | — | | | — | | | (408,190) | | | — | | | | | (408,190) | |
Common shares dividend declared ($2.10 per share) | — | | | — | | | — | | | — | | | — | | | — | | | — | | | (117,184) | | | — | | | | | (117,184) | |
| Preferred shares dividend declared | — | | | — | | | — | | | — | | | — | | | — | | | — | | | (52,112) | | | — | | | | | (52,112) | |
| Cancellation of Common Stock | — | | | — | | | (81,440,561) | | | (814) | | | — | | | — | | | 814 | | | — | | | — | | | | | — | |
| Cancellation of Treasury Stock | — | | | — | | | — | | | — | | | (26,379,401) | | | 1,203,220 | | | (1,203,220) | | | — | | | — | | | | | — | |
| Issuance of Common stock to Parent | — | | | — | | | 101,158,891 | | | 1,012 | | | — | | | — | | | (1,012) | | | — | | | — | | | | | — | |
| Balance as of December 31, 2023 | 29,200,000 | | | $ | 730,000 | | | 101,158,891 | | | $ | 1,012 | | | — | | | $ | — | | | $ | (308,114) | | | $ | 2,428,531 | | | $ | 85,569 | | | | | $ | 2,936,998 | |
| Net income (loss) | — | | | — | | | — | | | — | | | — | | | — | | | — | | | 518,195 | | | — | | | | | 518,195 | |
| Other comprehensive income (loss) | — | | | — | | | — | | | — | | | — | | | — | | | — | | | — | | | 7,774 | | | | | 7,774 | |
| Contributed capital from Parent for executive compensation | — | | | — | | | — | | | — | | | — | | | — | | | 3,840 | | | — | | | — | | | | | 3,840 | |
| Distributions to Parent | — | | | — | | | — | | | — | | | — | | | — | | | — | | | (605,542) | | | — | | | | | (605,542) | |
| Preferred shares dividend declared | — | | | — | | | — | | | — | | | — | | | — | | | — | | | (52,112) | | | — | | | | | (52,112) | |
| Balance at December 31, 2024 | 29,200,000 | | | $ | 730,000 | | | 101,158,891 | | | $ | 1,012 | | | — | | | $ | — | | | $ | (304,274) | | | $ | 2,289,072 | | | $ | 93,343 | | | | | $ | 2,809,153 | |