Condensed Consolidated Balance Sheets Statement (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Investments
Fixed-maturities held to maturity—at amortized cost (fair value $2,524 and $2,748)	$ 2,470	$ 2,640
Fixed-maturities available for sale at fair value (amortized cost $72,500 and $120,757)	75,516	118,733
Equity securities available for sale—at fair value (cost $88,768 and $114,425)	108,381	128,424
Trading securities—at fair value (including variable interest entity (“VIE”) securities of $0 and $94,521)	4,228,522	4,211,059
Short-term investments at fair value (including VIE investments of $0 and $149,981)	705,744	1,261,703
Other invested assets (including VIE assets of $75,413 and $0)	134,548	61,000
Total investments	5,255,181	5,783,559
Cash	32,617	35,589
Restricted cash	26,185	27,020
Deferred policy acquisition costs	99,386	139,906
Accrued investment income	31,456	32,262
Accounts and notes receivable	91,154	102,647
Property and equipment, at cost (less accumulated depreciation of $98,542 and $96,403)	7,341	11,044
Derivative assets (including VIE derivative assets of $1,750 and $1,602)	14,229	17,212
Deferred income taxes, net	15,975	15,975
Reinsurance recoverables	103,143	157,985
Other assets (including VIE other assets of $100,724 and $105,903)	354,863	333,566
Total assets	6,031,530	6,656,765
Liabilities
Unearned premiums	588,431	637,372
Reserve for losses and loss adjustment expenses (“LAE”)	3,250,280	3,310,902
Reserve for premium deficiency	4,183	3,644
Long-term debt	666,806	818,584
VIE debt—at fair value	107,833	228,240
Derivative liabilities (including VIE derivative liabilities of $75,413 and $19,501)	219,960	126,006
Payable for securities purchased	3,767	46,368
Accounts payable and accrued expenses (including VIE accounts payable of $390 and $530)	289,382	303,358
Total liabilities	5,130,642	5,474,474
Commitments and Contingencies (Note 16)
Stockholders’ equity
Common stock: par value $.001 per share; 325,000,000 shares authorized; 151,001,568 and 150,666,446 shares issued at June 30, 2012 and December 31, 2011, repectively; 133,520,514 and 133,199,159 shares outstanding at June 30, 2012 and December 31, 2011, respectively	151	151
Treasury stock, at cost: 17,481,054 and 17,467,287 shares at June 30, 2012 and December 31, 2011, respectively	(892,084)	(892,052)
Additional paid-in capital	1,966,767	1,966,565
Retained (deficit) earnings	(192,264)	96,227
Accumulated other comprehensive income (loss)	18,318	11,400
Total stockholders’ equity	900,888	1,182,291
Total liabilities and stockholders’ equity	$ 6,031,530	$ 6,656,765