Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CASH FROM (USED IN) OPERATING ACTIVITIES:
Net income to common stockholders	$ 119,511	$ 118,307
Adjustments to reconcile net income to net cash from operating activities:
Net investment gains	(7,343)	(19,044)
Depreciation and amortization	30,245	19,203
Noncontrolling interests	737	137
Investment funds	(16,636)	(6,061)
Stock incentive plans	8,766	8,171
Change in:
Arbitrage trading account	383	7,692
Premiums and fees receivable	(79,531)	(71,181)
Reinsurance accounts	(26,319)	(46,260)
Deferred policy acquisition costs	(33,466)	(21,314)
Income taxes	46,780	44,618
Reserves for losses and loss expenses	108,057	152,925
Unearned premiums	171,553	117,403
Other	(181,969)	(243,584)
Net cash from operating activities	140,768	61,012
CASH FROM (USED IN) INVESTING ACTIVITIES:
Proceeds from sale of fixed maturity securities	381,732	466,276
Proceeds from sale of equity securities	1,880	9,785
Distributions from investment funds	15,788	(9,363)
Proceeds from maturities and prepayments of fixed maturity securities	455,463	655,349
Purchase of fixed maturity securities	(1,032,129)	(1,094,439)
Purchase of equity securities	(1,108)	(8,882)
Real estate purchased	(53,781)	(44,162)
Change in loans receivable	123,737	41,244
Net additions to property, furniture and equipment	(12,461)	(7,680)
Change in balances due to security brokers	69,642	(2,652)
Payment for business purchased net of cash aquired	(54,313)	0
Net cash from (used in) investing activities	(105,550)	5,476
CASH FROM (USED IN) FINANCING ACTIVITIES:
Repayment of senior notes and other debt	(33,721)	(3,240)
Proceeds from Issuance of Debt	110,093	0
Cash dividends to common stockholders	(14,711)	(13,749)
Purchase of common treasury shares	(37,424)	(91,213)
Other, net	3,158	(1,187)
Net cash from (used in) financing activities	27,395	(109,389)
Net impact on cash due to change in foreign exchange rates	11,271	(16,845)
Net increase (decrease) in cash and cash equivalents	73,884	(59,746)
Cash and cash equivalents at beginning of year	763,631	674,441
Cash and cash equivalents at end of period	$ 837,515	$ 614,695