CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues
Net premiums earned	$ 1,265,745	$ 1,277,052	$ 2,495,944	$ 2,535,297
Net investment income	136,829	92,214	270,601	183,569
Other insurance related income	5,524	2,213	6,100	8,906
Net investment gains (losses):
(Increase) decrease in allowance for expected credit losses	354	(6,911)	(2,456)	(6,981)
Impairment losses	(9,083)	(473)	(9,083)	(582)
Other realized and unrealized investment gains (losses)	(15,641)	(165,879)	(33,019)	(260,208)
Total net investment gains (losses)	(24,370)	(173,263)	(44,558)	(267,771)
Total revenues	1,383,728	1,198,216	2,728,087	2,460,001
Expenses
Net losses and loss expenses	736,257	769,587	1,456,899	1,502,285
Acquisition costs	253,265	257,582	483,638	505,932
General and administrative expenses	168,503	165,586	335,314	334,627
Foreign exchange losses (gains)	30,104	(57,000)	38,814	(101,274)
Interest expense and financing costs	16,738	15,241	33,632	30,805
Reorganization expenses	0	15,728	0	15,728
Amortization of intangible assets	2,729	2,729	5,458	5,458
Total expenses	1,207,596	1,169,453	2,353,755	2,293,561
Income before income taxes and interest in income (loss) of equity method investments	176,132	28,763	374,332	166,440
Income tax (expense) benefit	(27,558)	4,965	(43,454)	4,942
Interest in income (loss) of equity method investments	2,100	1,050	(105)	12,600
Net income	150,674	34,778	330,773	183,982
Preferred share dividends	7,563	7,563	15,125	15,125
Net income available to common shareholders	$ 143,111	$ 27,215	$ 315,648	$ 168,857
Earnings per common share:
Earnings per common share (in usd per share)	$ 1.68	$ 0.32	$ 3.71	$ 1.98
Earnings per diluted common share (in usd per share)	$ 1.67	$ 0.32	$ 3.68	$ 1.97
Weighted average common shares outstanding (in shares)	85,207	85,173	85,036	85,068
Weighted average diluted common shares outstanding (in shares)	85,812	85,843	85,833	85,826