Amount of net assets (liabilities).

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Name:	us-gaap_AssetsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Related Party Arrangements - Origination of Mezzanine Loan (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended
	Jul. 31, 2015	Sep. 30, 2020
Variable Interest Entity, Not Primary Beneficiary
Related Party Transaction [Line Items]
VIE carrying value		$ 230.3
Mezzanine loans \| Variable Interest Entity, Not Primary Beneficiary
Related Party Transaction [Line Items]
VIE carrying value	$ 75.0
Mezzanine loans \| Espresso
Related Party Transaction [Line Items]
Fixed Rate	10.00%