Condensed Consolidated Balance Sheets (Unaudited) Statement (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets
Fixed-maturities held to maturity—at amortized cost (fair value $421 and $676)	$ 428	$ 679
Fixed-maturities available for sale—at fair value (amortized cost $97,819 and $39,481)	98,912	40,696
Equity securities available for sale—at fair value (cost $78,106 and $88,260)	121,868	112,139
Trading securities—at fair value	3,250,934	4,094,622
Short-term investments at fair value	1,423,784	777,532
Other invested assets (including variable interest entity (“VIE”) assets of $79,749 and $78,006)	129,394	126,750
Total investments	5,025,320	5,152,418
Cash	35,325	31,555
Restricted cash	22,991	24,226
Deferred policy acquisition costs	68,461	88,202
Accrued investment income	28,453	34,349
Accounts and notes receivable	85,047	87,519
Property and equipment, at cost (less accumulated depreciation of $100,900 and $98,909)	9,126	7,456
Derivative assets (including VIE derivative assets of $1,577 and $1,585)	20,844	13,609
Deferred income taxes, net	17,902	0
Reinsurance recoverables	57,260	89,204
Other assets (including VIE other assets of $93,375 and $99,337)	387,844	374,662
Total assets	5,758,573	5,903,200
LIABILITIES AND STOCKHOLDERS’ EQUITY
Unearned premiums	751,587	648,682
Reserve for losses and loss adjustment expenses (“LAE”)	2,346,879	3,149,936
Reserve for premium deficiency (“PDR”)	1,983	3,685
Long-term debt	921,927	663,571
VIE debt—at fair value	104,218	108,858
Derivative liabilities (including VIE derivative liabilities of $68,040 and $70,467)	344,870	266,873
Accounts payable and accrued expenses (including VIE accounts payable of $285 and $366)	392,589	325,270
Total liabilities	4,864,053	5,166,875
Commitments and Contingencies (Note 15)
Stockholders’ equity
Common stock: par value $.001 per share; 485,000,000 and 325,000,000 shares authorized at September 30, 2013 and December 31, 2012, respectively;190,634,951 and 151,131,173 shares issued at September 30, 2013 and December 31, 2012, respectively; 173,097,494 and 133,647,216 shares outstanding at September 30, 2013 and December 31, 2012, respectively	191	151
Treasury stock, at cost: 17,537,457 and 17,483,957 shares at September 30, 2013 and December 31, 2012, respectively	(892,807)	(892,094)
Additional paid-in capital	2,346,591	1,967,414
Retained deficit	(588,595)	(355,241)
Accumulated other comprehensive income	29,140	16,095
Total stockholders’ equity	894,520	736,325
Total liabilities and stockholders’ equity	$ 5,758,573	$ 5,903,200