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Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.","units":{"shares":[{"end":"2012-12-10","val":14060143,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14","frame":"CY2012Q4I"},{"end":"2013-03-25","val":14333570,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2013Q1I"}]}},"EntityPublicFloat":{"label":"Entity Public Float","description":"The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter.","units":{"USD":[{"end":"2012-06-30","val":64536056,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012Q2I"}]}}},"us-gaap":{"AccretionAmortizationOfDiscountsAndPremiumsInvestments":{"label":"Accretion (Amortization) of Discounts and Premiums, Investments","description":"The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.","units":{"USD":[{"start":"2011-01-01","end":"2011-09-30","val":-455000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2011-01-01","end":"2011-12-31","val":-812000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011"},{"start":"2012-01-01","end":"2012-09-30","val":-1072000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2012-01-01","end":"2012-12-31","val":-1537000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012"}]}},"AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment":{"label":"Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment","description":"Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.","units":{"USD":[{"end":"2011-12-31","val":2501000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011Q4I"},{"end":"2012-12-31","val":3368000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012Q4I"}]}},"AccumulatedOtherComprehensiveIncomeLossNetOfTax":{"label":"Accumulated Other Comprehensive Income (Loss), Net of Tax","description":"Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.","units":{"USD":[{"end":"2011-12-31","val":1114000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011Q4I"},{"end":"2011-12-31","val":1114000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"end":"2012-09-30","val":1943000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14","frame":"CY2012Q3I"},{"end":"2012-12-31","val":1942000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012Q4I"}]}},"AdditionalPaidInCapital":{"label":"Additional Paid in Capital","description":"Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.","units":{"USD":[{"end":"2011-12-31","val":74014000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011Q4I"},{"end":"2011-12-31","val":74015000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"end":"2012-09-30","val":74015000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14","frame":"CY2012Q3I"},{"end":"2012-12-31","val":75614000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012Q4I"}]}},"AmortizationOfDeferredLoanOriginationFeesNet":{"label":"Amortization of Deferred Loan Origination Fees, Net","description":"The net increase(decrease) in interest income during the period representing the allocation of deferred loan origination fees less deferred loan origination costs using the effective interest method over the term of the debt arrangement to which they pertain taking into account the effect of prepayments.","units":{"USD":[{"start":"2011-01-01","end":"2011-09-30","val":-135000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2011-01-01","end":"2011-12-31","val":-274000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011"},{"start":"2012-01-01","end":"2012-09-30","val":-444000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2012-01-01","end":"2012-12-31","val":-549000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012"}]}},"AmortizationOfIntangibleAssets":{"label":"Amortization of Intangible Assets","description":"The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.","units":{"USD":[{"start":"2011-01-01","end":"2011-09-30","val":5000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2011-01-01","end":"2011-12-31","val":7000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011"},{"start":"2012-01-01","end":"2012-09-30","val":8000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2012-01-01","end":"2012-12-31","val":14000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012"}]}},"AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount":{"label":"Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount","description":"Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.","units":{"shares":[{"start":"2011-01-01","end":"2011-09-30","val":1887939,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2011-01-01","end":"2011-12-31","val":1887939,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011"},{"start":"2012-01-01","end":"2012-09-30","val":1884243,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2012-01-01","end":"2012-12-31","val":1884243,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012"}]}},"Assets":{"label":"Assets","description":"Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. 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This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.","units":{"USD":[{"end":"2011-12-31","val":130649000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011Q4I"},{"end":"2011-12-31","val":130649000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"end":"2012-09-30","val":186939000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14","frame":"CY2012Q3I"},{"end":"2012-12-31","val":188936000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012Q4I"}]}},"AssetsSoldUnderAgreementsToRepurchaseInterestRate":{"label":"Assets Sold under Agreements to Repurchase, Interest Rate","description":"Interest rate on the amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher 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Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.","units":{"USD":[{"end":"2011-12-31","val":130649000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011Q4I"},{"end":"2011-12-31","val":130649000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"end":"2012-09-30","val":186939000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14","frame":"CY2012Q3I"},{"end":"2012-12-31","val":188636000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012Q4I"}]}},"AvailableForSaleSecuritiesGrossRealizedGainLossNet":{"label":"Available-for-sale Securities, Gross Realized Gain (Loss)","description":"This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. 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Business development includes a number of techniques designed to grow an economic enterprise. Such techniques include, but are not limited to, assessments of marketing opportunities and target markets, intelligence gathering on customers and competitors, generating leads for possible sales, follow-up sales activity, formal proposal writing and business model design. 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When stock is sold on a subscription basis, the issuer does not initially receive the total proceeds. In general, the issuer does not issue the shares to the investor until it receives the entire proceeds.","units":{"shares":[{"end":"2012-09-30","val":126573,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14","frame":"CY2012Q3I"}]}},"PreferredStockSharesAuthorized":{"label":"Preferred Stock, Shares Authorized","description":"The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.","units":{"shares":[{"end":"2011-12-31","val":7050000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011Q4I"},{"end":"2012-12-31","val":7050000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012Q4I"}]}},"PreferredStockSharesIssued":{"label":"Preferred Stock, Shares Issued","description":"Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). 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Does not include preferred shares that have been repurchased.","units":{"shares":[{"end":"2011-12-31","val":126573,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011Q4I"},{"end":"2012-12-31","val":126573,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012Q4I"}]}},"PreferredStockValue":{"label":"Preferred Stock, Value, Issued","description":"Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. 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with change in fair value recognized in other comprehensive income (available-for-sale).","units":{"USD":[{"start":"2011-01-01","end":"2011-09-30","val":20279000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2011-01-01","end":"2011-12-31","val":32996000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011"},{"start":"2012-01-01","end":"2012-09-30","val":27047000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2012-01-01","end":"2012-12-31","val":35358000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012"}]}},"ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase":{"label":"Proceeds from (Payments for) in Securities Sold under Agreements to Repurchase","description":"The cash flow from investments sold under the agreement to repurchase such 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taxonomy.","units":{"USD":[{"start":"2012-01-01","end":"2012-09-30","val":1167000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2012-01-01","end":"2012-12-31","val":1184000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012"}]}},"ProceedsFromSaleOfPropertyPlantAndEquipment":{"label":"Proceeds from Sale of Property, Plant, and Equipment","description":"The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.","units":{"USD":[{"start":"2011-01-01","end":"2011-09-30","val":3000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2011-01-01","end":"2011-12-31","val":3000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011"}]}},"ProfessionalFees":{"label":"Professional Fees","description":"A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.","units":{"USD":[{"start":"2011-01-01","end":"2011-09-30","val":328000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2011-07-01","end":"2011-09-30","val":120000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":790000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2011"},{"start":"2012-01-01","end":"2012-09-30","val":314000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14"},{"start":"2012-07-01","end":"2012-09-30","val":103000,"accn":"0001193125-12-502422","fy":2012,"fp":"Q3","form":"10-Q/A","filed":"2012-12-14","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":488000,"accn":"0001193125-13-134157","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-29","frame":"CY2012"}]}},"PropertyPlantAndEquipmentGross":{"label":"Property, Plant and Equipment, Gross","description":"Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. 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