Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows used in operating activities	$ (223,270)	$ (567,642)
Cash flows from investing activities:
Proceeds from sales of fixed-maturity investments available for sale	54,030	19,124
Proceeds from sales of trading securities	721,531	1,155,310
Proceeds from redemptions of fixed-maturity investments available for sale	8,056	7,721
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	(386,593)	(80,758)
Purchases of trading securities	0	(507,034)
Purchases of short-term investments, net	(349,313)	(646,098)
Sales of other assets, net	7,765	15,311
Purchases of property and equipment, net	(12,030)	(3,677)
Acquisitions, net of cash acquired	(294,869)	0
Net cash used in investing activities	(251,123)	(29,343)
Cash flows from financing activities:
Dividends paid	(1,388)	(1,200)
Proceeds/payments related to issuance or exchange of debt, net	293,809	381,165
Redemption of long-term debt	(57,223)	(79,372)
Issuance of common stock	247,188	299,410
Excess tax benefits from stock-based awards	106	752
Net cash provided by financing activities	482,492	600,755
Effect of exchange rate changes on cash	(49)	0
(Decrease) increase in cash	8,050	3,770
Cash, beginning of period	23,858	31,555
Cash, end of period	31,908	35,325
Supplemental disclosures of cash flow information:
Income taxes paid	8,496	2,414
Interest paid	$ 26,058	$ 18,172