Consolidated Statements Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
REVENUES:
Net premiums written	$ 2,413,254	$ 2,050,038
Change in net unearned premiums	(164,167)	(200,082)
Net premiums earned	2,249,087	1,849,956
Net investment income	173,512	158,577
Net realized and unrealized gains on investments	369,882	51,759
Change in allowance for expected credit losses on investments	(3,617)	(16,920)
Net investment gains	366,265	34,839
Revenues from non-insurance businesses	97,776	87,430
Insurance service fees	27,951	25,808
Other income	818	259
Total revenues	2,915,409	2,156,869
OPERATING COSTS AND EXPENSES:
Losses and loss expenses	1,339,252	1,121,592
Other operating costs and expenses	713,899	616,268
Expenses from non-insurance businesses	94,855	86,290
Interest expense	34,970	36,651
Total operating costs and expenses	2,182,976	1,860,801
Income before income taxes	732,433	296,068
Income tax expense	(139,403)	(64,352)
Net income before noncontrolling interests	593,030	231,716
Noncontrolling interests	(2,392)	(2,191)
Net income to common stockholders	$ 590,638	$ 229,525
NET INCOME PER SHARE:
Basic (in dollar per share)	$ 2.13	$ 0.83
Diluted (in dollar per share)	$ 2.12	$ 0.82