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Equity Method Investments in Real Estate Ventures at Fair Value - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Dec. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Fair value of equity method investment |  | $ 7,616 |  | $ 7,616 |  | $ 8,421
Distributions |  |  |  | (717) | $ 0 |
Change in fair value of equity method investment |  | 41 | $ 0 | 88 | $ 0 |
Level 3 |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Fair value of equity method investment |  | 7,616 |  | 7,616 |  | 8,421
Distributions |  |  |  | (717) |  |
Change in fair value of equity method investment |  |  |  | (88) |  |
Investors X |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Fair value of equity method investment |  | 6,400 |  | 6,400 |  | 7,200
Distributions |  | (144) |  | (514) |  |
Change in fair value of equity method investment |  | (73) |  | (42) |  |
The Hartford |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Fair value of equity method investment |  | 1,200 |  | 1,200 |  | $ 1,200
Distributions |  | (59) |  | (59) |  |
Change in fair value of equity method investment |  | $ 27 |  | $ 27 |  |
Percentage of ownership interest | 2.50% |  |  |  |  |
Equity method investment cost | $ 1,200 |  |  |  |  |

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(10)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(12)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21D -URI http://asc.fasb.org/extlink&oid=121586364&loc=SL94080555-108585 + Details
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