CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income	$ 330,773	$ 183,982
Adjustments to reconcile net income to net cash provided by operating activities:
Net investment (gains) losses	44,558	267,771
Net realized and unrealized (gains) losses on other investments	5,236	(39,419)
Amortization of fixed maturities	(5,916)	19,883
Interest in income (loss) of equity method investments	105	(12,600)
Other amortization and depreciation	31,182	31,057
Share-based compensation expense, net of cash payments	24,640	21,726
Changes in:
Accrued interest receivable	(6,565)	(9,615)
Reinsurance recoverable on unpaid losses and loss expenses	(34,416)	4,487
Reinsurance recoverable on paid losses and loss expenses	(32,700)	131,422
Deferred acquisition costs	(114,124)	(113,313)
Prepaid reinsurance premiums	(215,019)	(278,853)
Reserve for losses and loss expenses	253,575	(244,488)
Unearned premiums	778,063	880,348
Insurance and reinsurance balances, net	(381,824)	(256,531)
Other items	(76,489)	(72,091)
Net cash provided by operating activities	601,079	513,766
Purchases of:
Fixed maturities, available for sale	(3,230,430)	(3,947,249)
Fixed maturities, held to maturity	(25,000)	(198,904)
Equity securities	(84,272)	(49,924)
Mortgage loans	(20,686)	(101,264)
Other investments	(57,124)	(103,729)
Short-term investments	(76,052)	(90,430)
Proceeds from the sale of:
Fixed maturities, available for sale	2,694,067	3,419,822
Equity securities	14,220	55,287
Other investments	80,227	102,257
Short-term investments	58,875	37,798
Proceeds from redemption of fixed maturities, available for sale	423,836	670,456
Proceeds from redemption of fixed maturities, held to maturity	6,059	3,500
Proceeds from redemption of short-term investments	42,570	18,030
Proceeds from the repayment of mortgage loans	35,412	39,596
Proceeds from the (purchase) sale of other assets, net	(7,584)	(17,047)
Net cash used in investing activities	(145,882)	(161,801)
Cash flows from financing activities:
Repurchase of common shares - open market	0	(34,987)
Taxes paid on withholding shares	(17,051)	(13,346)
Dividends paid - common shares	(78,022)	(76,447)
Dividends paid - preferred shares	(15,125)	(15,125)
Federal Home Loan Bank advances, net	5,250	0
Net cash used in financing activities	(104,948)	(139,905)
Effect of exchange rate changes on foreign currency cash, cash equivalents and restricted cash	(6,632)	(31,822)
Increase in cash, cash equivalents and restricted cash	343,617	180,238
Cash, cash equivalents and restricted cash - beginning of period	1,174,653	1,317,690
Cash, cash equivalents and restricted cash - end of period	1,518,270	1,497,928
Supplemental disclosures of cash flow information:
Income taxes paid	31,547	12,865
Interest paid	$ 31,600	$ 29,700