Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Investments (Notes 6 and 7)
Fixed-maturities available for sale-at fair value (amortized cost of $4,550,954 and $5,498,422)	$ 4,271,916	$ 5,062,405
Trading securities-at fair value (amortized cost of $70,050 and $89,479)	65,661	82,652
Equity securities-at fair value (cost of $45,619 and $144,579)	36,632	138,189
Other long-term invested assets-at fair value	10,116	7,942
Short-term investments-at fair value (includes $62,212 and $125,723 of reinvested cash collateral held under securities lending agreements)	1,602,993	410,643
Total investments	5,987,318	5,701,831
Cash	24,829	19,220
Restricted cash	10	30
Accrued investment income	40,285	44,308
Accounts and notes receivable	120,197	120,990
Reinsurance recoverables (includes $1,788 and $415 for paid losses)	48,806	34,559
Deferred policy acquisition costs	19,018	17,746
Property and equipment, net	17,165	23,369
Prepaid federal income taxes (Note 10)	1,056,329	921,080
Other assets	334,172	358,962
Assets held for sale (Note 3)	474,268	1,447,440
Total assets	8,122,397	8,689,535
Liabilities
Reserve for losses and LAE (Note 11)	399,946	354,431
Unearned premiums	159,341	188,337
Senior notes (Note 12)	1,067,908	1,065,337
Other borrowings (Note 12)	41,207	45,865
Net deferred tax liability (Note 10)	942,193	772,232
Other liabilities (Note 9)	366,470	399,282
Liabilities held for sale (Note 3)	363,818	1,240,193
Total liabilities	3,340,883	4,065,677
Commitments and contingencies (Note 13)
Stockholders’ equity
Common stock ($0.001 par value; 485,000 shares authorized; 2025: 156,913 and 135,498 shares issued and outstanding, respectively; 2024: 168,350 and 147,569 shares issued and outstanding, respectively)	157	168
Treasury stock, at cost (2025: 21,415 shares; 2024: 20,782 shares)	(989,745)	(968,246)
Additional paid-in capital	861,211	1,246,826
Retained earnings	5,132,050	4,695,348
Accumulated other comprehensive income (loss) (Note 15)	(222,159)	(350,238)
Total stockholders’ equity	4,781,514	4,623,858
Total liabilities and stockholders’ equity	$ 8,122,397	$ 8,689,535