Commission Management Payable

12 Months Ended

Dec. 31, 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 $70.5 million as of December 31, 2017 and $3.6 million as of December 31, 2016 are classified as commission management payable in the accompanying consolidated statements of financial condition.