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Investments in Unconsolidated Real Estate Ventures - Summary of Composition of Investments (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Schedule of Equity Method Investments [Line Items] |  |  |
Total investments in unconsolidated real estate ventures | $ 455,476 |  | $ 461,369
Difference between the investments in unconsolidated real estate ventures and the net book value of the underlying assets | $ 19,500 |  | 18,900
Prudential Global Investment Management (PGIM) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest (as percent) | 50.00% |  |
Total investments in unconsolidated real estate ventures | $ 212,796 |  | 216,939
Landmark |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investments in unconsolidated real estate ventures | $ 65,313 |  | 66,724
Landmark | Minimum |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest (as percent) | 1.80% |  |
Landmark | Maximum |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest (as percent) | 49.00% |  |
CBREI Venture |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investments in unconsolidated real estate ventures | $ 64,251 |  | 65,190
CBREI Venture | Minimum |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest (as percent) | 5.00% |  |
CBREI Venture | Maximum |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest (as percent) | 64.00% |  |
Canadian Pension Plan Investment Board (CPPIB) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest (as percent) | 55.00% |  |
Total investments in unconsolidated real estate ventures | $ 47,072 |  | 47,522
Berkshire Group |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest (as percent) | 50.00% |  |
Total investments in unconsolidated real estate ventures | $ 51,662 |  | 50,649
Brandywine Realty Trust |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest (as percent) | 30.00% |  |
Total investments in unconsolidated real estate ventures | $ 13,751 |  | 13,710
Other |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investments in unconsolidated real estate ventures | 631 |  | 635
Investments in Unconsolidated Real Estate Ventures |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Property Management Fee Revenue | 5,900 | $ 6,700 |
1101 17th Street | Canadian Pension Plan Investment Board (CPPIB) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investments in unconsolidated real estate ventures | $ 0 |  | $ 0

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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- Definition The carrying amount of investments in unconsolidated real estate and other joint ventures not separately presented. This includes direct and indirect investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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