Investment Securities - Consolidated sponsored funds (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Investment Securities
Cash	$ 565,171	$ 555,102	$ 447,112	$ 558,495
Redeemable noncontrolling interests	(8,516)	(10,653)
Consolidated Sponsored Funds
Investment Securities
Cash	3,638	6,885
Investments	133,276	145,710
Other assets	3,346	763
Other liabilities	(2,253)	(390)
Redeemable noncontrolling interests	(8,516)	(10,653)
Net interest in consolidated sponsored funds	129,491	$ 142,315
Deconsolidated sponsored funds value	2,600
Deconsolidated redeemable noncontrolling interest	$ 2,600

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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