Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities
Net cash provided by (used in) operating activities	$ 189,249	$ 176,850
Proceeds from sales of:
Fixed-maturities available for sale	230,081	193,967
Trading securities	9,122	0
Equity securities	45,295	5,770
Proceeds from redemptions of:
Fixed-maturities available for sale	250,764	477,664
Trading securities	1,310	45,521
Purchases of:
Fixed-maturities available for sale	(581,433)	(906,025)
Equity securities	(4,426)	(9,112)
Sales, redemptions and (purchases) of:
Short-term investments, net	(30,438)	213,095
Other assets and other invested assets, net	(195)	(791)
Additions to property and equipment	(10,113)	(7,485)
Net cash provided by (used in) investing activities	(90,033)	12,604
Cash flows from financing activities
Dividends and dividend equivalents paid	(75,201)	(71,288)
Issuance of common stock	1,514	569
Repurchases of common stock	(20,009)	(186,908)
Credit facility commitment fees paid	(474)	(380)
Change in secured borrowings, net (with terms three months or less)	(12,635)	46,605
Proceeds from secured borrowings (with terms greater than three months)	54,580	13,151
Repayments of secured borrowings (with terms greater than three months)	(41,092)	(8,000)
Net cash provided by (used in) financing activities	(93,317)	(206,251)
Increase (decrease) in cash and restricted cash	5,899	(16,797)
Cash and restricted cash, beginning of period	56,560	152,620
Cash and restricted cash, end of period	$ 62,459	$ 135,823