Consolidated Statements of Financial Condition (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2013	Dec. 31, 2012
ASSETS:
Cash and cash equivalents	$ 425,060	$ 600,936
Cash and investments segregated under federal regulations	7,787,104	7,714,642
Securities purchased under agreements to resell	759,843	1,092,586
Receivable from:
Clients	2,275,837	2,266,874
Brokers, dealers and clearing organizations	139,865	189,119
Mutual funds, insurance companies and other	423,937	355,507
Securities owned, at fair value:
Inventory securities	67,407	74,552
Investment securities	115,827	111,904
Equipment, property and improvements, at cost, net of accumulated depreciation and amortization	542,105	537,049
Other assets	101,667	99,074
TOTAL ASSETS	12,638,652	13,042,243
Payable to:
Clients	9,775,125	10,075,684
Brokers, dealers and clearing organizations	77,960	65,477
Securities sold, not yet purchased, at fair value	8,790	22,327
Accrued compensation and employee benefits	597,337	665,509
Accounts payable and accrued expenses	217,755	124,850
Long-term debt	4,976	5,503
Total liabilities before liabilities subordinated to claims of general creditors	10,681,943	10,959,350
Liabilities subordinated to claims of general creditors	50,000	100,000
Contingencies (Note 8)
Partnership capital subject to mandatory redemption, net of reserve for anticipated withdrawals	1,810,654	1,812,247
Reserve for anticipated withdrawals	96,055	170,646
Total partnership capital subject to mandatory redemption	1,906,709	1,982,893
TOTAL LIABILITIES	$ 12,638,652	$ 13,042,243