Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

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CONSOLIDATION (Variable Interest Entities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Variable Interest Entity [Line Items]
Assets of consolidated VIEs	$ 8,560,082		$ 8,563,522
Liabilities of consolidated VIEs	6,994,887		7,103,230
Consolidated Funds
Variable Interest Entity [Line Items]
Net income attributable to non-controlling interests related to consolidated VIEs	367	$ 15,855
Non-Consolidated Variable Interest Entities
Variable Interest Entity [Line Items]
Maximum exposure to loss attributable to the Company's investment in VIEs	266,833		251,376
Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum exposure to loss attributable to the Company's investment in VIEs	174,849		175,620
Consolidated VIEs \| Consolidated Funds
Variable Interest Entity [Line Items]
Assets of consolidated VIEs	6,126,584		6,231,245
Liabilities of consolidated VIEs	$ 5,417,561		$ 5,538,054