Subsequent Events	3 Months Ended
Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	17. Subsequent Events As required by FASB ASC Topic 855, “Subsequent Events,” the Company has evaluated subsequent events for adjustment to or disclosure in its condensed consolidated financial statements through the date the condensed consolidated financial statements were issued. On April 20, 2020 the energy markets exhibited extraordinary price activity in the New York Mercantile Exchange (“NYMEX”) West Texas Intermediate Crude Oil contract. The price of the May 2020 contract dropped to an unprecedented negative price of $37.63. This price was the basis for determining the settlement price for cash-settled contracts traded on the CME Globex and also for a separate, expiring cash-settled futures contract listed on the Intercontinental Exchange Europe (“ICE Europe”). Several of the Company’s customers held long positions in these CME and ICE Europe contracts, and as a result they incurred losses, including losses in excess of the equity in their accounts. The Company fulfilled the required variation margin settlements with the respective clearinghouses on behalf of its customers. While the Company originally recognized an aggregate provisionary loss of approximately $88 million, the Company has since determined to compensate certain affected customers in connection with their losses resulting from the contracts settling at a price below zero. As a result, the Company will recognize a revised aggregate loss of approximately $104 million. The Company does not believe that this loss will have a material effect on its financial condition. Except as disclosed above and in Note 4 and Note 13, no other recordable or disclosable events occurred. *****

Subsequent Events

3 Months Ended

Mar. 31, 2020

17. Subsequent Events

As required by FASB ASC Topic 855, “Subsequent Events,” the Company has evaluated subsequent events for adjustment to or disclosure in its condensed consolidated financial statements through the date the condensed consolidated financial statements were issued.

On April 20, 2020 the energy markets exhibited extraordinary price activity in the New York Mercantile Exchange (“NYMEX”) West Texas Intermediate Crude Oil contract. The price of the May 2020 contract dropped to an unprecedented negative price of $37.63. This price was the basis for determining the settlement price for cash-settled contracts traded on the CME Globex and also for a separate, expiring cash-settled futures contract listed on the Intercontinental Exchange Europe (“ICE Europe”). Several of the Company’s customers held long positions in these CME and ICE Europe contracts, and as a result they incurred losses, including losses in excess of the equity in their accounts. The Company fulfilled the required variation margin settlements with the respective clearinghouses on behalf of its customers. While the Company originally recognized an aggregate provisionary loss of approximately $88 million, the Company has since determined to compensate certain affected customers in connection with their losses resulting from the contracts settling at a price below zero. As a result, the Company will recognize a revised aggregate loss of approximately $104 million. The Company does not believe that this loss will have a material effect on its financial condition.

Except as disclosed above and in Note 4 and Note 13, no other recordable or disclosable events occurred.

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