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Proprietary securities transactions entered into by the broker-dealer for trading or investment purposes are included in \"\"Securities Owned and Securities Sold, Not Yet Purchased.\"\" Although proprietary trading is frequently thought of as purchasing securities for sale to others, trading securities for the broker-dealer's own account sometimes leads to a liability for the fair value of securities sold but not yet purchased, that is, sold short. The broker-dealer is then obliged to purchase the securities at a future date at the then-current market 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This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.","units":{"USD":[{"end":"2009-12-31","val":0,"accn":"0001104659-10-042271","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2009Q4I"},{"end":"2010-06-30","val":0,"accn":"0001104659-10-042271","fy":2010,"fp":"Q2","form":"10-Q","filed":"2010-08-05","frame":"CY2010Q2I"}]}},"ProceedsFromBankDebt":{"label":"Proceeds from Bank Debt","description":"The cash inflow from bank borrowing during the 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Amount excludes temporary equity. Alternate caption for the concept is permanent 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