Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investments:
Fixed maturity securities (amortized cost of $16,471,304 and $13,755,858; allowance for expected credit losses of $22,625 and $2,580 at December 31, 2021 and 2020)	$ 16,602,673	$ 14,159,369
Investment funds	1,480,612	1,309,430
Real estate	1,852,508	1,960,914
Arbitrage trading account	1,179,606	341,473
Equity securities	941,243	625,667
Loans receivable (net of allowance for expected credit losses of $1,718 and $5,437 at December 31, 2021 and 2020)	115,172	84,913
Total investments	22,171,814	18,481,766
Cash and cash equivalents	1,568,843	2,372,366
Premiums and fees receivable (net of allowance for expected credit losses of $25,218 and $22,883 at December 31, 2021 and 2020)	2,522,972	2,167,799
Due from reinsurers (net of allowance for expected credit losses of $7,713 and $7,801 at December 31, 2021 and 2020)	2,923,026	2,424,502
Deferred policy acquisition costs	676,145	556,168
Prepaid reinsurance premiums	676,915	648,376
Trading account receivable from brokers and clearing organizations	0	524,727
Property, furniture and equipment	419,883	405,930
Goodwill	169,652	169,652
Accrued investment income	122,938	120,464
Current federal and foreign income taxes	23,570	5,893
Deferred federal and foreign income taxes	57,425	29,055
Other assets	753,231	700,215
Total assets	32,086,414	28,606,913
Liabilities:
Reserves for losses and loss expenses	15,390,888	13,784,430
Unearned premiums	4,847,160	4,073,191
Due to reinsurers	514,980	426,124
Trading account securities sold but not yet purchased	1,169	10,048
Trading account payable to brokers and clearing organizations	53,636	0
Current federal and foreign income taxes	21,068	41,282
Deferred federal and foreign income taxes	17,470	42,161
Senior notes and other debt		1,623,025
Subordinated debentures		1,102,309
Other liabilities	1,305,245	1,178,546
Total liabilities	25,418,684	22,281,116
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	70,535	70,535
Additional paid-in capital	1,016,372	1,012,483
Retained earnings	9,015,135	8,348,381
Accumulated other comprehensive loss	(281,955)	(62,172)
Treasury stock, at cost, 175,895,912 and 174,851,350 shares, respectively	(3,167,076)	(3,058,425)
Total common stockholders’ equity	6,653,011	6,310,802
Noncontrolling interests	14,719	14,995
Total equity	6,667,730	6,325,797
Total liabilities and equity	$ 32,086,414	$ 28,606,913