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Consolidation Consolidated Federated Fund VIEs (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Investments—consolidated investment companies | $ 58,072 | $ 25,368
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net | 14,900 | 17,000
Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member] |  |
Variable Interest Entity [Line Items] |  |
Investments—consolidated investment companies | 43,200 | 25,400
Less: Liabilities | 700 | 3,000
Less: Redeemable noncontrolling interest in subsidiaries | 28,300 | 8,700
Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member] | Cash and Cash Equivalents [Member] |  |
Variable Interest Entity [Line Items] |  |
Consolidated assets | 0 | 3,100
Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member] | Trade Accounts Receivable [Member] |  |
Variable Interest Entity [Line Items] |  |
Consolidated assets | $ 700 | $ 200

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