Consolidated Statement of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	11 Months Ended	12 Months Ended
	Nov. 30, 2010	Nov. 30, 2011	Dec. 31, 2009
Revenues:
Commissions	$ 466,246	$ 534,726	$ 512,293
Principal transactions	509,070	428,035	838,396
Investment banking	890,334	1,122,528	474,315
Asset management fees and investment income from managed funds	16,785	44,125	35,887
Interest	852,494	1,248,132	732,250
Other	62,417	152,092	38,918
Total revenues	2,797,346	3,529,638	2,632,059
Interest expense	605,096	980,825	468,798
Net revenues	2,192,250	2,548,813	2,163,261
Interest on mandatorily redeemable preferred interest of consolidated subsidiaries	14,916	3,622	37,248
Net revenues, less mandatorily redeemable preferred interest	2,177,334	2,545,191	2,126,013
Non-interest expenses:
Compensation and benefits	1,282,644	1,482,604	1,195,971
Floor brokerage and clearing fees	110,835	126,313	80,969
Technology and communications	160,987	215,940	141,233
Occupancy and equipment rental	68,085	84,951	72,824
Business development	62,015	93,645	37,614
Professional services	49,080	66,305	41,125
Other	47,017	56,099	48,530
Total non-interest expenses	1,780,663	2,125,857	1,618,266
Earnings before income taxes	396,671	419,334	507,747
Income tax expense	156,404	132,966	195,928
Net earnings	240,267	286,368	311,819
Net earnings to noncontrolling interests	16,601	1,750	36,537
Net earnings to common shareholders	$ 223,666	$ 284,618	$ 275,282
Earnings per common share:
Basic	$ 1.10	$ 1.28	$ 1.36
Diluted	$ 1.09	$ 1.28	$ 1.35
Weighted average common shares:
Basic	196,393	211,056	200,446
Diluted	200,511	215,171	204,572