CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues
Net premiums earned	$ 1,322,564	$ 1,284,866	$ 3,818,508	$ 3,820,163
Net investment income	154,201	88,177	424,802	271,744
Other insurance related income	10,344	1,092	16,444	9,998
Net investment gains (losses):
(Increase) decrease in allowance for expected credit losses	1,077	(3,210)	(1,380)	(10,191)
Impairment losses	(41)	(6,491)	(9,124)	(7,074)
Other realized and unrealized investment gains (losses)	(54,150)	(136,757)	(87,167)	(396,966)
Total net investment gains (losses)	(53,114)	(146,458)	(97,671)	(414,231)
Total revenues	1,433,995	1,227,677	4,162,083	3,687,674
Expenses
Net losses and loss expenses	783,940	941,911	2,240,840	2,444,196
Acquisition costs	263,389	240,511	747,027	746,443
General and administrative expenses	179,283	158,245	514,596	492,872
Foreign exchange gains	(50,570)	(135,660)	(11,755)	(236,934)
Interest expense and financing costs	16,445	15,915	50,077	46,720
Reorganization expenses	28,997	6,213	28,997	21,941
Amortization of intangible assets	2,729	2,729	8,188	8,188
Total expenses	1,224,213	1,229,864	3,577,970	3,523,426
Income (loss) before income taxes and interest in income (loss) of equity method investments	209,782	(2,187)	584,113	164,248
Income tax (expense) benefit	(24,624)	363	(68,078)	5,304
Interest in income (loss) of equity method investments	2,940	(7,560)	2,835	5,040
Net income (loss)	188,098	(9,384)	518,870	174,592
Preferred share dividends	7,563	7,563	22,688	22,688
Net income (loss) available (attributable) to common shareholders	$ 180,535	$ (16,947)	$ 496,182	$ 151,904
Earnings (loss) per common share:
Earnings (loss) per common share (in usd per share)	$ 2.12	$ (0.20)	$ 5.83	$ 1.79
Earnings (loss) per common share (in usd per share)	$ 2.10	$ (0.20)	$ 5.77	$ 1.77
Weighted average common shares outstanding (in shares)	85,223	84,660	85,099	84,930
Weighted average diluted common shares outstanding (in shares)	86,108	84,660	85,927	85,674