Investment Securities - Consolidated sponsored funds (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Investment Securities
Cash	$ 427,939	$ 555,102	$ 467,458	$ 558,495
Redeemable noncontrolling interests	(28,718)	(10,653)
Consolidated Sponsored Funds
Investment Securities
Cash	3,706	6,885
Investments	215,116	145,710
Other assets	7,847	763
Other liabilities	(6,800)	(390)
Redeemable noncontrolling interests	(28,718)	(10,653)
Net interest in consolidated sponsored funds	191,151	$ 142,315
Deconsolidated cash and cash equivalents value	2,600
Deconsolidated investments value	7,300
Deconsolidated redeemable noncontrolling interest	$ 9,900

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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