Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities
Net cash provided by (used in) operating activities	$ 116,778	$ 116,675
Proceeds from sales of:
Fixed-maturities available for sale	110,882	128,072
Trading securities	9,123	0
Equity securities	2,076	4,535
Proceeds from redemptions of:
Fixed-maturities available for sale	110,973	223,937
Trading securities	211	25,547
Purchases of:
Fixed-maturities available for sale	(300,474)	(514,582)
Equity securities	(1,572)	(5,382)
Sales, redemptions and (purchases) of:
Short-term investments, net	43,190	70,153
Other assets and other invested assets, net	(165)	0
Additions to property and equipment	(4,786)	(4,075)
Net cash provided by (used in) investing activities	(30,542)	(71,795)
Cash flows from financing activities
Dividends and dividend equivalents paid	(35,685)	(35,354)
Issuance of common stock	983	331
Repurchases of common stock	(15,007)	(18,988)
Credit facility commitment fees paid	(193)	(189)
Change in secured borrowings, net (with terms three months or less)	(52,120)	(7,796)
Proceeds from secured borrowings (with terms greater than three months)	10,569	3,000
Repayments of secured borrowings (with terms greater than three months)	(599)	(5,000)
Net cash provided by (used in) financing activities	(92,052)	(63,996)
Increase (decrease) in cash and restricted cash	(5,816)	(19,116)
Cash and restricted cash, beginning of period	56,560	152,620
Cash and restricted cash, end of period	$ 50,744	$ 133,504