Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows used in operating activities	$ (260,968)	$ (291,570)
Cash flows from investing activities:
Proceeds from sales of fixed-maturity investments available for sale	46,718	16,049
Proceeds from sales of trading securities	525,178	630,435
Proceeds from redemptions of fixed-maturity investments available for sale	3,015	2,415
Proceeds from redemptions of fixed-maturity investments held to maturity	300	255
Proceeds from redemptions of equity securities available for sale	0	10,503
Purchases of fixed-maturity investments available for sale	(253,072)	0
Purchases of trading securities	0	(429,001)
Purchases of short-term investments, net	(227,572)	(554,429)
Sales of other assets, net	6,825	15,210
Purchases of property and equipment, net	(8,048)	(712)
Acquisitions, net of cash acquired	(294,869)	0
Net cash used in investing activities	(201,525)	(309,275)
Cash flows from financing activities:
Dividends paid	(910)	(767)
Proceeds/payments related to issuance or exchange of debt, net	294,402	381,165
Redemption of long-term debt	(57,223)	(79,372)
Issuance of common stock	247,388	299,542
Excess tax benefits from stock-based awards	106	553
Net cash provided by financing activities	483,763	601,121
Effect of exchange rate changes on cash	(13)	0
(Decrease) increase in cash	21,257	276
Cash, beginning of period	23,858	31,555
Cash, end of period	45,115	31,831
Supplemental disclosures of cash flow information:
Income taxes paid	7,109	1,785
Interest paid	$ 21,558	$ 15,970