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Investments in Unconsolidated Entities - Schedule of Investments in Real Estate Ventures (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Equity Method Investment and Joint Venture, Fair Value Change [Roll Forward] |  |
Fair value investments, starting balance | $ 6,307 |
Change in fair value | (18) | $ 47
Fair value investments, ending balance | $ 4,665 |

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- Definition Fair value portion of investments accounted under the equity method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117311354&loc=d3e32014-111567 + Details
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