Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from Operating Activities:
Net (loss) income	$ (31,634)	$ 9,233
Adjustments to reconcile net (loss) income to net cash provided by operating activities
Depreciation and amortization	32,450	33,324
Deferred income tax (benefit) expense	(12,426)	3,245
Provision for doubtful accounts	108	587
Non-cash share based compensation	19,409	12,238
Gain on sale of investment research operations	(21)
Changes in operating assets and liabilities:
Cash restricted or segregated under regulations and other	91	2,918
Deposits with clearing organizations	(6,742)	(23,715)
Securities owned, at fair value	(2,744)	3,122
Receivables from brokers, dealers and clearing organizations	736,136	(500,565)
Receivables from customers	(33,777)	42,018
Accounts payable and accrued expenses	1,659	(34,125)
Payables to brokers, dealers and clearing organizations	(784,076)	414,725
Payables to customers	17,827	42,100
Securities sold, not yet purchased, at fair value	3,175	(2,380)
Income taxes receivable/payable	(9,572)	(9,644)
Excess tax benefit from share-based payment arrangements	(1,102)	(2,920)
Other, net	(3,447)	(4,794)
Net cash used in operating activities	(74,686)	(14,633)
Cash flows from Investing Activities:
Capital purchases	(9,668)	(5,792)
Capitalization of software development costs	18,705	19,761
Proceeds from sale of investment research operations, net of deal costs	6,125
Net cash used in investing activities	(22,248)	(25,553)
Cash flows from Financing Activities:
Repayments of long term debt	(4,649)	(7,367)
Proceeds from borrowing under short-term bank loans	51,553	(13,347)
Debt issuance costs	(810)
Excess tax benefit from share-based payment arrangements	1,102	2,920
Common stock issued	3,111	1,911
Common stock repurchased	(22,112)	(31,727)
Dividends paid	(6,865)	(4,712)
Shares withheld for net settlements of share-based awards	(6,617)	(8,397)
Net cash provided by (used in) financing activities	14,713	(60,719)
Effect of exchange rate changes on cash and cash equivalents	12,443	(7,700)
Net decrease in cash and cash equivalents	(69,778)	(108,605)
Cash and cash equivalents - beginning of year	330,653	275,210
Cash and cash equivalents - end of period	260,875	166,605
Supplemental cash flow information:
Interest paid	3,067	2,836
Income taxes paid	$ 12,319	$ 13,884