Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows used in operating activities	$ (361,899)	$ (608,917)
Cash flows from investing activities:
Proceeds from sales of fixed-maturity investments available for sale	44,935	101,648
Proceeds from sales of equity securities available for sale	30,727	555
Proceeds from sales of trading securities	2,066,088	2,444,549
Proceeds from redemptions of fixed-maturity investments available for sale	3,738	28,032
Proceeds from redemptions of fixed-maturity investments held to maturity	250	3,195
Purchases of trading securities	(2,137,677)	(2,206,653)
Sales and redemptions of short-term investments, net	556,048	407,494
Sales (purchases) of other invested assets, net	(74,999)	(2,717)
Proceeds from the sale of investment in affiliate	14,700	0
Purchases of property and equipment, net	(452)	(5,729)
Net cash provided by investing activities	503,358	770,374
Cash flows used in financing activities:
Dividends paid	(666)	(667)
Redemption of long-term debt	(143,770)	(160,000)
Net cash used in financing activities	(144,436)	(160,667)
Effect of exchange rate changes on cash	5	(2)
(Decrease) increase in cash	(2,972)	788
Cash, beginning of period	35,589	20,334
Cash, end of period	32,617	21,122
Supplemental disclosures of cash flow information:
Income taxes paid (received)	1,498	(1,275)
Interest paid	$ 21,820	$ 27,244