Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
CASH FROM (USED IN) OPERATING ACTIVITIES:
Net income to common stockholders	$ 241,342	$ 349,634
Adjustments to reconcile net income to net cash from operating activities:
Net investment gains	(46,601)	(161,922)
Depreciation and amortization	42,267	50,832
Noncontrolling interests	151	227
Investment funds	(27,912)	(84,385)
Stock incentive plans	14,973	13,615
Change in:
Arbitrage trading account	(702)	(12,956)
Premiums and fees receivable	(133,227)	(197,004)
Reinsurance accounts	(60,595)	(57)
Deferred policy acquisition costs	(34,245)	(31,527)
Income taxes	48,929	7,742
Reserves for losses and loss expenses	285,204	172,759
Unearned premiums	174,108	297,721
Other	(170,809)	(150,056)
Net cash from operating activities	332,883	254,623
CASH FROM (USED IN) INVESTING ACTIVITIES:
Proceeds from sale of fixed maturity securities	794,106	513,281
Proceeds from sale of equity securities	23,547	112,590
Distributions from investment funds	129,181	211,974
Proceeds from maturities and prepayments of fixed maturity securities	1,534,982	1,214,221
Purchase of fixed maturity securities	(2,168,400)	(2,034,009)
Purchase of equity securities	(8,543)	(48,484)
Additions to real estate	(84,826)	(63,919)
SEC Schedule III, Real Estate Accumulated Depreciation, Real Estate Sold	0	343,723
Change in loans receivable	62,601	(312,071)
Net additions to property, furniture and equipment	(23,504)	(22,555)
Change in balances due to security brokers	18,298	28,313
Net cash from business sold	0	15,548
Net cash from (used in) investing activities	277,442	(41,388)
CASH USED IN FINANCING ACTIVITIES:
Repayment of senior notes and other debt	(275,788)	0
Proceeds from Issuance of Debt	3,749	4,988
Proceeds from Stock Options Exercised	1	53
Cash dividends to common stockholders	(28,447)	(26,825)
Purchase of common treasury shares	(218,132)	(197,254)
Other, net	(92)	1,365
Net cash used in financing activities	(518,709)	(217,673)
Net impact on cash due to change in foreign exchange rates	(9,689)	7,371
Net change in cash and cash equivalents	81,927	2,933
Cash and cash equivalents at beginning of year	674,441	839,738
Cash and cash equivalents at end of period	$ 756,368	$ 842,671