CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 522,318	$ 413,926
Cash and securities segregated under federal and other regulations	203,045	166,992
Financial instruments owned, at fair value, including securities pledged to counterparties that had the right to deliver or repledge of $5,769,593 at June 30, 2013 and $4,605,155 at December 31, 2012:
Equities	1,609,957	1,463,916
Debt securities	138,730	111,157
Listed equity options	188,166	202,091
Loan inventory	130,635	191,712
Other financial instruments	1,076	237
Securitized HECM loan inventory	5,327,418	4,054,905
Total financial instruments owned, at fair value	7,395,982	6,024,018
Collateralized agreements:
Securities borrowed	1,158,981	1,008,720
Receivable from brokers, dealers and clearing organizations	1,366,974	868,805
Fixed assets and leasehold improvements, at cost, less accumulated depreciation and amortization	90,535	94,226
Investments	80,281	78,348
Goodwill	196,113	213,900
Intangible assets, less accumulated amortization	49,645	55,654
Income taxes receivable	6,486	152,576
Assets of business held for sale	0	449,509
Assets within discontinued operations	108,804	0
Other assets	253,847	251,773
Total assets	11,433,011	9,778,447
Financial instruments sold, not yet purchased, at fair value:
Equities	1,290,401	1,164,999
Debt securities	90,421	118,991
Listed equity options	132,161	155,942
Other financial instruments	0	5,505
Total financial instruments sold, not yet purchased, at fair value	1,512,983	1,445,437
Collateralized financings:
Securities loaned	626,891	504,082
Financial instruments sold under agreements to repurchase	545,000	355,000
Other secured financings	95,912	146,330
Liability to GNMA trusts, at fair value	5,284,303	4,002,704
Total collateralized financings	6,552,106	5,008,116
Payable to brokers, dealers and clearing organizations	635,914	378,724
Payable to customers	527,918	388,676
Accrued compensation expense	109,453	141,794
Accrued expenses and other liabilities	181,938	186,746
Liabilities of business held for sale	0	357,661
Liabilities within discontinued operations	84,535	0
Long-term debt	346,449	388,753
Total liabilities	9,951,296	8,295,907
Convertible Preferred Stock
Series A convertible preferred stock, Shares issued: 400 at December 31, 2012, Shares outstanding: 243 at December 31, 2012	0	229,857
Equity
Class A common stock, Shares authorized: 500,000 at June 30, 2013 and at December 31, 2012; Shares issued: 449,247 at June 30, 2013 and 274,821 at December 31, 2012; Shares outstanding: 373,271 at June 30, 2013 and 202,056 at December 31, 2012	4,492	2,748
Additional paid-in capital	1,683,390	1,400,317
Retained earnings	670,423	710,621
Treasury stock, at cost; 75,976 at June 30, 2013 and 72,765 shares at December 31, 2012	(870,819)	(858,907)
Accumulated other comprehensive loss	(5,771)	(2,096)
Total equity	1,481,715	1,252,683
Total liabilities, convertible preferred stock and equity	$ 11,433,011	$ 9,778,447