Consolidated Sponsored Investment Products - Balances of Consolidated Sponsored Investment Products (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Total cash	$ 97,384	$ 203,304	$ 271,545	$ 63,446
Total investments	56,738	63,448
Total liabilities	(276,408)	(112,350)
Redeemable noncontrolling interest	(73,864)	(23,071)
Consolidated Sponsored Investment Products [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Total cash	11,866	8,687
Total investments	323,335	236,652
All other assets	8,549	6,960
Total liabilities	(15,387)	(12,556)
Redeemable noncontrolling interest	(73,864)	(23,071)
The Company’s net interests in consolidated sponsored investment products	$ 254,499	$ 216,672
The Company's net interest as a percentage of total investments of consolidated sponsored investment products	78.70%	91.60%

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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