Commission Management Payable (Notes)

6 Months Ended

Jun. 30, 2017

Commission Management Payable [Abstract]

Commission management payable [Text Block]

Commission Management Payable

The Company receives a gross commission from various clearing brokers, which is then used to fund commission sharing and recapture arrangements, less the portion retained as income to the Company. Accrued commission sharing and commission recapture payable of $88.9 million as of June 30, 2017 and $3.6 million as of December 31, 2016 are classified as commission management payable in the accompanying condensed consolidated statements of financial condition.