v2.4.0.8

Collateralized Transactions | 6 Months Ended
--- | ---
Jun. 30, 2014
Disclosure Collateralized Transactions [Abstract] |
Collateralized Transactions | 7. Collateralized Transactions The Company enters into securities borrowing and lending transactions and agreements to repurchase and resell securities to finance trading inventory, to obtain securities for settlement and to earn residual interest rate spreads. In addition, the Company’s customers pledge their securities owned to collateralize margin loans. Under these transactions, the Company either receives or provides collateral, including equity, corporate debt and U.S. government securities. Under many agreements, the Company is permitted to sell or repledge securities received as collateral and use these securities to secure repurchase agreements, enter into securities lending transactions or deliver these securities to counterparties to cover short positions. The Company also engages in securities financing transactions with and for customers through margin lending. Customer receivables generated from margin lending activity are collateralized by customer‑owned securities held by the Company. Customers’ required margin levels and established credit limits are monitored continuously by risk management staff using automated systems. Pursuant to Company policy and as enforced by such systems, customers are required to deposit additional collateral or reduce positions, when necessary to avoid automatic liquidation of their positions. Margin loans are extended to customers on a demand basis and are not committed facilities. Factors considered in the acceptance or rejection of margin loans are the amount of the loan, the degree of leverage being employed in the customer account and an overall evaluation of the customer’s portfolio to ensure proper diversification or, in the case of concentrated positions, appropriate liquidity of the underlying collateral. Additionally, transactions relating to concentrated or restricted positions are limited or prohibited by raising the level of required margin collateral (to 100% in the extreme case). Underlying collateral for margin loans is evaluated with respect to the liquidity of the collateral positions, valuation of securities, volatility analysis and an evaluation of industry concentrations. Adherence to the Company’s collateral policies significantly limits the Company’s credit exposure to margin loans in the event of a customer’s default. Under margin lending agreements, the Company may request additional margin collateral from customers and may sell securities that have not been paid for or purchase securities sold but not delivered from customers, if necessary. At June 30, 2014 and December 31, 2013, approximately $15.33 billion and $13.60 billion, respectively, of customer margin loans were outstanding. Amounts relating to collateralized transactions at June 30, 2014 and December 31, 2013 are summarized as follows (millions):
|  | June 30, 2014 |  | December 31, 2013
|  | Permitted |  | Sold or |  | Permitted |  | Sold or
|  | to Repledge |  | Repledged |  | to Repledge |  | Repledged
Securities lending transactions |  | $ | 10,023.5 |  | $ | 3,170.3 |  | $ | 9,331.9 |  | $ | 2,504.3
Agreements to resell 1 |  |  | 6,187.0 |  |  | 6,183.8 |  |  | 7,116.1 |  |  | 7,099.6
Customer margin assets |  |  | 14,122.6 |  |  | 5,564.4 |  |  | 11,753.3 |  |  | 4,602.9
|  | $ | 30,333.1 |  | $ | 14,918.5 |  | $ | 28,201.3 |  | $ | 14,206.8
| (1) |  | At June 30, 2014, $5.91 billion or 96% (at December 31, 2013, $6.73 billion, or 95%, of securities acquired through agreements to resell that are shown as repledged have been deposited in a separate bank account for the exclusive benefit of customers in accordance with SEC Rule 15c3-3.
In the normal course of business, the Company pledges qualified securities with clearing organizations to satisfy daily margin and clearing fund requirements. At June 30, 2014 and December 31, 2013, the majority of the Company’s government securities owned were pledged to clearing organizations. Financial instruments owned and pledged, including amounts pledged to affiliates, where the counterparty has the right to repledge, at June 30, 2014 and December 31, 2013 consisted of the following (millions):
|  | June 30, |  | December 31,
|  | 2014 |  | 2013
Stocks |  | $ | 759.7 |  | $ | 1,097.8
Warrants |  |  | 0.3 |  |  | 0.2
U.S. and foreign government obligations |  |  | 78.0 |  |  | 64.4
Corporate and municipal bonds |  |  | 1.5 |  |  | 1.1
|  | $ | 839.5 |  | $ | 1,163.5

X
- Definition Description of collateralized transactions including financial assets that the company holds for its own account for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions as well as margin loans to customers. + References No definition available. + Details
Name: | ibkr_CollateralizedTransactionsTextBlock
Namespace Prefix: | ibkr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ibkr_DisclosureCollateralizedTransactionsAbstract
Namespace Prefix: | ibkr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration