Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FROM (USED IN) OPERATING ACTIVITIES:
Net income to common stockholders	$ 123,447	$ 119,511
Adjustments to reconcile net income to net cash from operating activities:
Net investment gains	(52,348)	(7,343)
Depreciation and amortization	18,133	30,245
Noncontrolling interests	1,227	737
Investment funds	(26,649)	(16,636)
Stock incentive plans	10,780	8,766
Change in:
Arbitrage trading account	2,350	383
Premiums and fees receivable	(59,244)	(79,531)
Reinsurance accounts	67,205	(26,319)
Deferred policy acquisition costs	(6,126)	(33,466)
Income taxes	50,595	46,780
Reserves for losses and loss expenses	10,424	108,057
Unearned premiums	113,483	171,553
Other	(177,805)	(181,969)
Net cash from operating activities	75,472	140,768
CASH USED IN INVESTING ACTIVITIES:
Proceeds from sale of fixed maturity securities	719,969	381,732
Proceeds from sale of equity securities	51,854	1,880
(Contributions to) distributions from investment funds	(11,290)	15,788
Proceeds from maturities and prepayments of fixed maturity securities	888,423	455,463
Purchase of fixed maturity securities	(1,767,208)	(1,032,129)
Purchase of equity securities	(103)	(1,108)
Real estate purchased	(48,710)	(53,781)
Change in loans receivable	3,147	123,737
Net additions to property, furniture and equipment	(12,457)	(12,461)
Change in balances due to security brokers	(22,034)	69,642
Payment for business purchased net of cash aquired	(71,346)	(54,313)
Net cash used in investing activities	(269,755)	(105,550)
CASH (USED IN) FROM FINANCING ACTIVITIES:
Repayment of senior notes and other debt	(1,475)	(33,721)
Proceeds from Issuance of Debt	0	110,093
Cash dividends to common stockholders	0	(14,711)
Purchase of common treasury shares	0	(37,424)
Other, net	(1,281)	3,158
Net cash (used in) from financing activities	(2,756)	27,395
Net impact on cash due to change in foreign exchange rates	10,147	11,271
Net change in cash and cash equivalents	(186,892)	73,884
Cash and cash equivalents at beginning of year	795,285	763,631
Cash and cash equivalents at end of period	$ 608,393	$ 837,515