Investments in Partnerships - Summary of Assets and Liabilities of Unconsolidated Joint Venture (Details) - PM Gallery LP $ in Thousands	Dec. 10, 2020 USD ($)
Schedule Of Equity Method Investments [Line Items]
Unconsolidated joint venture assets	$ 401,655
Unconsolidated joint venture liabilities	363,393
Unconsolidated joint venture net assets	38,262
Equity interest in joint venture (based on 50% ownership)	19,131
Equity interests on the consolidated balance sheets	16,261
Maximum risk of loss	$ 16,261