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Consolidated Sponsored Investment Products - Schedule of Trading Securities (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | $ 133,856 | $ 41,367
Unrealized Loss | (2,979) | (165)
Unrealized Gain | 8,177 | 2,025
Fair Value | 139,054 | 43,227
Trading Debt Securities [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 48,994 | 24,830
Unrealized Loss | (2,097) | (21)
Unrealized Gain | 217 | 1,003
Fair Value | 47,114 | 25,812
Trading Equity Securities [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 84,862 | 16,537
Unrealized Loss | (882) | (144)
Unrealized Gain | 7,960 | 1,022
Fair Value | $ 91,940 | $ 17,415

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- Details
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- Definition Current investment securities of consolidated sponsored investment products, which includes financial instruments that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time, usually less than one year or the normal operating cycle, whichever is longer). + References No definition available. + Details
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- Definition Investments of Consolidated Sponsored Investment Products Cost + References No definition available. + Details
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