Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Investments:
Fixed maturity securities (amortized cost of $18,715,483 and $16,471,304; allowance for expected credit losses of $37,466 and $22,625 at December 31, 2022 and 2021)	$ 17,587,349	$ 16,602,673
Investment funds	1,608,548	1,480,612
Real estate	1,340,622	1,852,508
Arbitrage trading account	944,230	1,179,606
Equity securities	1,185,894	941,243
Loans receivable (net of allowance for expected credit losses of $1,791 and $1,718 at December 31, 2022 and 2021)	193,002	115,172
Total investments	22,859,645	22,171,814
Cash and cash equivalents	1,449,346	1,568,843
Premiums and fees receivable (net of allowance for expected credit losses of $30,660 and $25,218 at December 31, 2022 and 2021)	2,779,244	2,522,972
Due from reinsurers (net of allowance for expected credit losses of $8,064 and $7,713 at December 31, 2022 and 2021)	3,187,730	2,923,026
Deferred policy acquisition costs	763,486	676,145
Prepaid reinsurance premiums	696,468	676,915
Trading account receivable from brokers and clearing organizations	233,863	0
Property, furniture and equipment	423,232	419,883
Goodwill	185,509	169,652
Accrued investment income	166,784	122,938
Current federal and foreign income taxes	39,123	23,570
Deferred federal and foreign income taxes	340,647	57,425
Other assets	736,022	753,231
Total assets	33,861,099	32,086,414
Liabilities:
Reserves for losses and loss expenses	17,011,223	15,390,888
Unearned premiums	5,297,654	4,847,160
Due to reinsurers	523,131	514,980
Trading account securities sold but not yet purchased	0	1,169
Trading account payable to brokers and clearing organizations	0	53,636
Current federal and foreign income taxes	34,350	21,068
Deferred federal and foreign income taxes	11,646	17,470
Senior notes and other debt	1,828,823	2,259,416
Subordinated debentures	1,008,371	1,007,652
Other liabilities	1,377,740	1,305,245
Total liabilities	27,092,938	25,418,684
Equity:
Preferred stock, par value $.10 per share: Authorized 5,000,000 shares; issued and outstanding - none	0	0
Common stock, par value $.20 per share: Authorized 500,000,000 shares, issued and outstanding, net of treasury shares, 177,825,150 and 183,411,907 shares, respectively	105,803	105,803
Additional paid-in capital	997,534	981,104
Retained earnings	10,161,005	9,015,135
Accumulated other comprehensive loss	(1,264,581)	(281,955)
Treasury stock, at cost, 264,468,528 and 263,843,868 shares, respectively	(3,251,429)	(3,167,076)
Total common stockholders’ equity	6,748,332	6,653,011
Noncontrolling interests	19,829	14,719
Total equity	6,768,161	6,667,730
Total liabilities and equity	$ 33,861,099	$ 32,086,414