Cash (Tables)

6 Months Ended

Jun. 30, 2018

Cash

Summary of cash, cash equivalents and restricted cash shown in the statement of cash flows

	June 30,		December 31,
	2018		2017
Cash and cash equivalents	$	236,446	$	287,452
Cash restricted or segregated under regulations and other		18,263		18,599
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$	254,709	$	306,051