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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% |  |

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