Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities
Net income	$ 144,558	$ 152,354
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Purchases of residential mortgage loans held for sale	(210,909)	(167,241)
Proceeds from sales of residential mortgage loans held for sale	71,046	52,204
Principal payments from residential mortgage loans held for sale	12,249	1,262
Net (gains) losses on investments and other financial instruments	723	(490)
Net (gains) losses on consolidated VIE assets and liabilities	(1,430)	0
Loss on extinguishment of debt	0	4,275
Depreciation, other amortization, and other impairments, net	14,376	14,364
Deferred income tax provision	42,705	45,202
Change in:
Accrued investment income	2,950	(550)
Accounts and notes receivable	995	(6,426)
Reinsurance recoverable	(3,794)	(2,242)
Deferred policy acquisition costs	(109)	157
Other assets	8,761	7,748
Unearned premiums	(9,406)	(10,272)
Reserve for losses and LAE	14,619	(8,315)
Reinsurance funds withheld	3,156	2,896
Other liabilities	(22,684)	(33,882)
Net cash provided by (used in) operating activities	67,806	51,044
Proceeds from sales of:
Available for sale securities	117,832	130,248
Equity securities	14,319	840
Proceeds from redemptions of:
Available for sale securities	220,334	164,685
Trading securities	7,803	704
Purchases of:
Available for sale securities	(285,497)	(328,174)
Equity securities	(2,077)	(816)
Sales, redemptions and (purchases) of:
Short-term investments, net	(4,408)	(39,147)
Other assets and other invested assets, net	(279)	(180)
Principal payments from securitized residential mortgage loans held for investment	39,419	0
Additions to property and equipment	(1,209)	(1,558)
Net cash provided by (used in) investing activities	106,237	(73,398)
Cash flows from financing activities
Dividends and dividend equivalents paid	(37,288)	(37,563)
Issuance of common stock	109	460
Repurchases of common stock	(208,924)	(50,018)
Issuance of senior notes	0	617,164
Redemption of senior notes	0	(527,079)
Issuance of securitized nonrecourse debt	353,744	0
Repayments of securitized nonrecourse debt	(39,419)	0
Proceeds (repayments) related to cash collateral for loaned securities, net	10,385	(59,832)
Proceeds from secured borrowings	336,069	298,477
Repayments of secured borrowings	(601,696)	(210,353)
Credit facility commitment fees paid	(146)	(142)
Net cash provided by (used in) financing activities	(187,166)	31,114
Increase (decrease) in cash and restricted cash	(13,123)	8,760
Cash and restricted cash, beginning of period	41,473	20,065
Cash and restricted cash, end of period	28,350	28,825
Supplemental noncash information
Transfer from residential mortgage loans held for sale to securitized residential mortgage loans held for investment	369,977	0
Retention of mortgage servicing and other related rights from residential mortgage loan sales	$ 1,486	$ 310