Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Investments:
Fixed maturity securities	$ 12,705,160	$ 11,616,844
Equity securities available for sale	170,991	283,338
Arbitrage trading account	450,648	522,128
Loans receivable	322,012	343,583
Investment funds	1,211,401	1,067,495
Equity securities available for sale	731,612	715,242
Total investments	15,591,824	14,548,630
Cash and cash equivalents	674,441	839,738
Premiums and fees receivable	1,651,088	1,557,480
Due from reinsurers	1,503,441	1,533,103
Accrued investment income	120,367	118,329
Prepaid reinsurance premiums	395,748	367,803
Deferred policy acquisition costs	488,525	452,101
Property, furniture and equipment	332,098	339,448
Goodwill	150,944	110,146
Accrued investment income	371,034	304,936
Deferred federal and foreign income taxes	0	20,120
Current federal and foreign income taxes	67,623	24,737
Other assets	369,558	335,225
Total assets	21,716,691	20,551,796
Liabilities:
Reserves for losses and loss expenses	10,369,701	10,080,941
Unearned premiums	3,026,732	2,781,437
Due to reinsurers	237,270	276,755
Trading account securities sold but not yet purchased	106,079	162,278
Deferred federal and foreign income taxes	37,452	0
Other liabilities	859,736	848,749
Subordinated debentures	340,060	339,800
Senior notes and other debt	2,115,527	1,692,442
Total liabilities	17,092,557	16,182,402
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	991,512	967,440
Retained earnings	5,732,410	5,265,015
Accumulated other comprehensive income	183,550	189,391
Treasury stock, at cost, 108,369,082 and 102,884,751 shares, respectively	(2,364,551)	(2,132,835)
Total common stockholders’ equity	4,589,945	4,336,035
Noncontrolling interests	34,189	33,359
Total equity	4,624,134	4,369,394
Total liabilities and equity	$ 21,716,691	$ 20,551,796