Commitments and Contingencies - Incentive Fees (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Loss Contingencies [Line Items]
Carried interest subject to contingencies	$ 441,150	$ 326,466
Deferred incentive fee revenue	3,704	3,704
Incentive fees, unrecorded estimate	110,288	81,616
Carried Interest
Loss Contingencies [Line Items]
Deferred incentive fee revenue	$ 3,704	$ 3,704

Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

No definition available.

Name:	us-gaap_DeferredRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant