Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Investments:
Fixed maturity securities	$ 12,444,394	$ 12,705,160
Equity securities available for sale	150,866	170,991
Arbitrage trading account	376,697	450,648
Loans receivable	273,103	322,012
Investment funds	1,170,040	1,211,401
Equity securities available for sale	936,367	731,612
Total investments	15,351,467	15,591,824
Cash and cash equivalents	763,631	674,441
Premiums and fees receivable	1,669,186	1,651,088
Due from reinsurers	1,532,829	1,503,441
Accrued investment income	123,164	120,367
Prepaid reinsurance premiums	394,387	395,748
Deferred policy acquisition costs	513,128	488,525
Property, furniture and equipment	348,224	332,098
Goodwill	153,291	150,944
Accrued investment income	383,115	371,034
Current federal and foreign income taxes	55,763	67,623
Other assets	442,782	369,558
Total assets	21,730,967	21,716,691
Liabilities:
Reserves for losses and loss expenses	10,669,150	10,369,701
Unearned premiums	3,137,133	3,026,732
Due to reinsurers	224,752	237,270
Trading account securities sold but not yet purchased	37,035	106,079
Deferred federal and foreign income taxes	6,811	37,452
Other liabilities	837,937	859,736
Subordinated debentures	340,320	340,060
Senior notes and other debt	1,844,621	2,115,527
Total liabilities	17,097,759	17,092,557
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, 132,233,167 and 136,017,732 shares, respectively	47,024	47,024
Additional paid-in capital	1,005,455	991,512
Retained earnings	6,178,070	5,732,410
Accumulated other comprehensive income (loss)	(66,698)	183,550
Treasury stock, at cost, 111,810,081 and 108,369,082 shares, respectively	(2,563,605)	(2,364,551)
Total common stockholders’ equity	4,600,246	4,589,945
Noncontrolling interests	32,962	34,189
Total equity	4,633,208	4,624,134
Total liabilities and equity	$ 21,730,967	$ 21,716,691