Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities:
Net loss	$ (37,022)	$ (31,634)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	33,687	32,450
Deferred income tax expense (benefit)	35,182	(12,426)
Provision for doubtful accounts	451	108
Non-cash share-based compensation	15,730	19,409
Impairment charges	325
Gain on sale of investment research operations		(21)
Changes in operating assets and liabilities:
Cash restricted or segregated under regulations and other	26,949	91
Deposits with clearing organizations	(15,244)	(6,742)
Securities owned, at fair value	813	(2,744)
Receivables from brokers, dealers and clearing organizations	(43,275)	736,136
Receivables from customers	(33,608)	(33,777)
Accounts payable and accrued expenses	(18,942)	1,659
Payables to brokers, dealers and clearing organizations	661	(784,076)
Payables to customers	29,628	17,827
Securities sold, not yet purchased, at fair value	(209)	3,175
Income taxes receivable/payable	2,592	(9,572)
Excess tax benefit from share-based payment arrangements		(1,102)
Other, net	(5,685)	(3,447)
Net cash used in operating activities	(7,967)	(74,686)
Cash Flows from Investing Activities:
Capital purchases	(10,228)	(9,668)
Capitalization of software development costs	(21,014)	(18,705)
Proceeds from sale of investment research operations, net of deal costs		6,125
Net cash used in investing activities	(31,242)	(22,248)
Cash Flows from Financing Activities:
Repayments of long term debt	(3,963)	(4,649)
Proceeds from borrowing under short-term bank loans	29,846	51,553
Debt issuance costs	(762)	(810)
Excess tax benefit from share-based payment arrangements		1,102
Common stock issued	776	3,111
Common stock repurchased	(7,404)	(22,112)
Dividends paid	(6,891)	(6,865)
Shares withheld for net settlements of share-based awards	(10,484)	(6,617)
Net cash provided by financing activities	1,118	14,713
Effect of exchange rate changes on cash and cash equivalents	(1,093)	12,443
Net decrease in cash and cash equivalents	(39,184)	(69,778)
Cash and cash equivalents - beginning of period	277,977	330,653
Cash and cash equivalents - end of period	238,793	260,875
Supplemental cash flow information:
Interest paid	3,412	3,067
Income taxes paid	$ 7,421	$ 12,319