Consolidated Balance Sheets Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Investments:
Fixed maturity securities (amortized cost of $18,467,661 and $16,471,304; allowance for expected credit losses of $34,716 and $22,625 at September 30, 2022 and December 31, 2021, respectively)	$ 17,230,936	$ 16,602,673
Investment funds	1,662,029	1,480,612
Real estate	1,320,550	1,852,508
Equity securities	1,173,589	941,243
Arbitrage trading account	1,165,016	1,179,606
Loans receivable (net of allowance for expected credit losses of $1,992 and $1,718 at September 30, 2022 and December 31, 2021, respectively)	112,800	115,172
Total investments	22,664,920	22,171,814
Cash and cash equivalents	1,130,750	1,568,843
Premiums and fees receivable (net of allowance for expected credit losses of $30,578 and $25,218 at September 30, 2022 and December 31, 2021, respectively)	2,752,678	2,522,972
Due from reinsurers (net of allowance for expected credit losses of $7,999 and $7,713 at September 30, 2022 and December 31, 2021, respectively)	3,160,843	2,923,026
Deferred policy acquisition costs	766,923	676,145
Prepaid reinsurance premiums	701,044	676,915
Property, furniture and equipment	414,228	419,883
Goodwill	169,652	169,652
Accrued investment income	150,801	122,938
Current and deferred federal and foreign income taxes	407,595	42,457
Other assets	757,385	753,231
Total assets	33,076,819	32,047,876
Liabilities:
Reserves for losses and loss expenses	16,540,123	15,390,888
Unearned premiums	5,374,985	4,847,160
Due to reinsurers	579,262	514,980
Trading account securities sold but not yet purchased	6	1,169
Trading account payable to brokers and clearing organizations	820	53,636
Other liabilities	1,369,169	1,305,245
Senior notes and other debt	1,834,287	2,259,416
Subordinated debentures	1,008,191	1,007,652
Total liabilities	26,706,843	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	984,803	981,104
Retained earnings	9,805,237	9,015,135
Accumulated other comprehensive loss	(1,385,810)	(281,955)
Treasury stock, at cost, 263,212,911 and 263,843,868 shares, respectively	(3,163,967)	(3,167,076)
Total stockholders’ equity	6,346,066	6,653,011
Noncontrolling interests	23,910	14,719
Total equity	6,369,976	6,667,730
Total liabilities and equity	$ 33,076,819	$ 32,047,876
Common shares authorized (in shares)	1,250,000,000	750,000,000
Liability for Claims and Claims Adjustment Expense [Line Items]
Liability recognized for best estimate net of reinsurance, reported losses	$ 343,000