Concentrations of Credit Risk

6 Months Ended

Jun. 30, 2016

Risks and Uncertainties [Abstract]

Concentrations of Credit Risk

Note 12. Concentrations of Credit Risk

Financial instruments could potentially expose us to concentrations of credit risk, including unsecured receivables from the Exchange. A large majority of our revenue and receivables are from the Exchange and affiliates. See also Note 1, "Nature of Operations". Management fee amounts and other reimbursements due from the Exchange and affiliates were $387.3 million and $348.1 million at June 30, 2016 and December 31, 2015, respectively.