Investments in Unconsolidated Entities - Schedule of Investments in Real Estate Ventures (Detail) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Equity Method Investment and Joint Venture, Fair Value Change [Roll Forward]
Fair value investments, starting balance	$ 6,307
Change in fair value	112	$ 88
Fair value investments, ending balance	3,652
Level 3
Equity Method Investment and Joint Venture, Fair Value Change [Roll Forward]
Fair value investments, starting balance	6,307
Distributions	(2,543)
Change in fair value	(112)
Fair value investments, ending balance	$ 3,652

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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