Limited Liability Companies Accounted for Under Equity Method (Parenthetical) (Detail) $ in Millions	Mar. 31, 2019 USD ($)
Brunswick Associates
Schedule Of Equity Method Investments [Line Items]
Third-party term loan	$ 8.2
Grayson Properties
Schedule Of Equity Method Investments [Line Items]
Third-party term loan	13.9
FTX MOB Phase II limited partnership
Schedule Of Equity Method Investments [Line Items]
Third-party term loan	5.0
Committed investment in equity and debt financing, funded	2.5
Commitment to investment	$ 2.1