Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net profit for the period	$ 6,199	$ 19,226
Non-cash items included in net profit:
Depreciation and amortization	6,437	6,007
Deferred income tax	2,177	8,960
Amortization of notes receivable	10,140	10,005
Amortization of debt issuance costs	571	391
Amortization of intangibles	2,163	2,162
Provision for credit losses	(286)	359
Share-based compensation	2,720	(408)
Decrease (increase) in operating assets:
Cash and securities segregated for regulatory and other purposes	(38,052)	(28,814)
Deposits with clearing organizations	(1,830)	(9,710)
Receivable from brokers and clearing organizations	(57,060)	77,364
Receivable from customers	1,437	(16,857)
Income taxes receivable	1,824	(8,667)
Securities purchased under agreement to resell	(215,412)	(267,103)
Securities owned	(680,609)	(155,031)
Notes receivable	(10,404)	(13,587)
Other	36,805	(13,485)
Increase (decrease) in operating liabilities:
Drafts payable	(22,765)	(10,917)
Payable to brokers and clearing organizations	23,905	(30,976)
Payable to customers	153,570	8,173
Securities sold under agreement to repurchase	777,999	308,419
Securities sold, but not yet purchased	21,422	50,131
Accrued compensation	(58,966)	(61,102)
Accounts payable and other liabilities	12,528	48,789
Cash used in operating activities	(25,487)	(76,671)
Cash flows from investing activities:
Purchase of office facilities	(3,013)	(5,607)
Cash used in investing activities	(3,013)	(5,607)
Cash flows from financing activities:
Cash dividends paid on Class A non-voting and Class B voting common stock	(3,003)	(2,932)
Issuance of Class A non-voting common stock	337	2,002
Tax shortfall from share-based compensation	(1,624)	(104)
Senior secured note issuance	200,000
Senior secured credit note repayments	(22,503)	(1,000)
Subordinate note repayment	(100,000)
Increase (decrease) in bank call loans, net	12,000	62,400
Cash provided by financing activities	85,207	60,366
Net increase (decrease) in cash and cash equivalents	56,707	(21,912)
Cash and cash equivalents, beginning of period	52,854	68,918
Cash and cash equivalents, end of period	109,561	47,006
Schedule of non-cash investing and financing activities:
Employee share plan issuance	10,392	1,765
Supplemental disclosure of cash flow information:
Cash paid during the periods for interest	13,345	10,189
Cash paid during the periods for income taxes	$ 4,087	$ 8,020

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration