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Investments - Equity Method Investments (Details) - Partnerships - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 166,106	$ 122,505
Primary funds
Schedule of Equity Method Investments [Line Items]
Equity method investments	37,317	22,791
Secondary funds
Schedule of Equity Method Investments [Line Items]
Equity method investments	19,872	15,762
Direct/co-investment funds
Schedule of Equity Method Investments [Line Items]
Equity method investments	50,288	35,902
Customized separate accounts
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 58,629	$ 48,050

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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