Other Revenues and Expenses	12 Months Ended
Dec. 31, 2019
Other Revenues and Expenses [Abstract]
Other Income and Other Expense Disclosure [Text Block]	Other Revenues and ExpensesOther expenses, during the years ended December 31, 2019, 2018, and 2017, are primarily the general administrative expenses of the various operating company subsidiaries or the Consolidated Funds.

The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-URI http://asc.fasb.org/topic&trid=2122503

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 610
-URI http://asc.fasb.org/topic&trid=49130413

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