Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Net cash flows from operating activities:
Net income (loss)	$ (147,990)	$ 389,463
Adjustments to reconcile net income (loss) to net cash used for operations:
Deferred income tax provision (benefit)	(17,192)	193,966
Depreciation and amortization	78,332	82,901
Share-based compensation	16,055	52,869
Provision for doubtful accounts	16,598	7,125
Net securities gains	(8,142)	(24,182)
(Income) related to associated companies	(40,690)	(119,404)
Distributions from associated companies	71,858	135,388
Net losses related to property and equipment, and other assets	11,566	934
Change in estimated litigation reserve	0	(88,500)
Net change in:
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	(85,446)	1,046,324
Trading assets	1,639,682	(770,207)
Investments in managed funds	77,405	(307,949)
Securities borrowed	(604,046)	(988,097)
Securities purchased under agreements to resell	607,560	137,998
Receivables from brokers, dealers and clearing organizations	(310,748)	(321,111)
Receivables from customers of securities operations	86,026	33,904
Other receivables	(156,998)	(211,187)
Other assets	(383,319)	(102,062)
Trading liabilities	1,214,045	325,114
Securities loaned	(28,625)	1,098,339
Securities sold under agreements to repurchase	(1,548,353)	463,962
Payables to brokers, dealers and clearing organizations	(239,760)	(728,172)
Payables to customers of securities operations	(367,505)	(1,785,772)
Trade payables, expense accruals and other liabilities	76,697	(143,887)
Other	16,853	(71,674)
Net cash used for operating activities	(26,137)	(1,693,917)
Net cash flows from investing activities:
Acquisitions of property, equipment and leasehold improvements, and other assets	(159,866)	(137,935)
Proceeds from disposals of property and equipment, and other assets	24,644	5,461
Acquisitions, net of cash acquired	(9,673)	0
Advances on notes, loans and other receivables	(190,019)	(283,000)
Collections on notes, loans and other receivables	20,274	99,999
Loans to and investments in associated companies	(329,840)	(936,713)
Capital distributions and loan repayments from associated companies	321,953	937,543
Purchases of investments (other than short-term)	(387,651)	(687,908)
Proceeds from maturities of investments	59,493	241,121
Proceeds from sales of investments	174,405	1,170,119
Other	(3,247)	1,706
Net cash provided by (used for) investing activities	(479,527)	410,393
Net cash flows from financing activities:
Issuance of debt, net of issuance costs	413,645	155,408
Net change in short-term borrowings	86,547	350,000
Reduction of debt	(635,176)	(118,637)
Net proceeds from other secured financings	64,493	187,887
Net change in bank overdrafts	(54,508)	0
Issuance of common shares	734	954
Distributions to redeemable noncontrolling interests	6,859	0
Distributions to noncontrolling interests	(834)	0
Contributions from noncontrolling interests	115,801	993
Purchase of common shares for treasury	(34,357)	(30,356)
Dividends paid	(45,899)	(46,529)
Other	278	423
Net cash provided by (used for) financing activities	(96,135)	500,143
Effect of foreign exchange rate changes on cash	(5,913)	(2,362)
Net decrease in cash and cash equivalents	(607,712)	(785,743)
Cash and cash equivalents at January 1,	3,638,648	4,276,775
Cash and cash equivalents at June 30,	3,030,936	3,491,032
Supplemental disclosures of cash flow information:
Interest	465,861	457,022
Income tax payments (refunds), net	(14,653)	4,624
Non-cash financing activities:
Purchase of common shares for treasury settled after June 30, 2016	$ (24,870)	$ 0