Consolidated Balance Sheets Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Investments:
Fixed maturity securities (amortized cost of $17,697,420 and $16,471,304; allowance for expected credit losses of $33,405 and $22,625 at June 30, 2022 and December 31, 2021, respectively)	$ 16,851,514	$ 16,602,673
Investment funds	1,702,270	1,480,612
Real estate	1,304,094	1,852,508
Equity securities	1,155,326	941,243
Arbitrage trading account	1,142,003	1,179,606
Loans receivable (net of allowance for expected credit losses of $2,175 and $1,718 at June 30, 2022 and December 31, 2021, respectively)	113,483	115,172
Total investments	22,268,690	22,171,814
Cash and cash equivalents	1,316,603	1,568,843
Premiums and fees receivable (net of allowance for expected credit losses of $30,557 and $25,218 at June 30, 2022 and December 31, 2021, respectively)	2,799,805	2,522,972
Due from reinsurers (net of allowance for expected credit losses of $7,744 and $7,713 at June 30, 2022 and December 31, 2021, respectively)	3,046,754	2,923,026
Deferred policy acquisition costs	753,185	676,145
Prepaid reinsurance premiums	694,888	676,915
Trading account receivables from brokers and clearing organizations	9,937	0
Property, furniture and equipment	415,446	419,883
Goodwill	169,652	169,652
Accrued investment income	133,014	122,938
Current and deferred federal and foreign income taxes	296,943	42,457
Other assets	787,530	753,231
Total assets	32,692,447	32,047,876
Liabilities:
Reserves for losses and loss expenses	16,145,821	15,390,888
Unearned premiums	5,249,543	4,847,160
Due to reinsurers	541,689	514,980
Trading account securities sold but not yet purchased	68	1,169
Trading account payable to brokers and clearing organizations	0	53,636
Other liabilities	1,378,169	1,305,245
Senior notes and other debt	1,832,273	2,259,416
Subordinated debentures	1,008,011	1,007,652
Total liabilities	26,155,574	25,380,146
Equity:
Perferred 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, 177,930,502 and 183,411,907 shares, respectively	105,803	105,803
Additional paid-in capital	1,001,093	981,104
Retained earnings	9,602,948	9,015,135
Accumulated other comprehensive loss	(1,029,630)	(281,955)
Treasury stock, at cost, 263,741,648 and 263,843,868 shares, respectively	(3,165,729)	(3,167,076)
Total stockholders’ equity	6,514,485	6,653,011
Noncontrolling interests	22,388	14,719
Total equity	6,536,873	6,667,730
Total liabilities and equity	$ 32,692,447	$ 32,047,876
Common shares authorized (in shares)	1,250,000,000	750,000,000