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Segment Information - Summary of Certain Balance Sheet Data by Segment (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Real estate, at cost | $ 5,851,533 | $ 5,775,519
Investments in and advances to unconsolidated real estate ventures | 542,983 | 543,026
Total assets (1) | 6,139,813 | 5,986,251
Operating Segments | Commercial Segment |  |
Segment Reporting Information [Line Items] |  |
Real estate, at cost | 3,450,039 | 3,415,294
Investments in and advances to unconsolidated real estate ventures | 398,849 | 396,199
Total assets (1) | 3,570,707 | 3,361,122
Operating Segments | Multifamily |  |
Segment Reporting Information [Line Items] |  |
Real estate, at cost | 2,016,514 | 1,998,297
Investments in and advances to unconsolidated real estate ventures | 107,162 | 107,882
Total assets (1) | 1,697,302 | 1,682,872
Other |  |
Segment Reporting Information [Line Items] |  |
Real estate, at cost | 384,980 | 361,928
Investments in and advances to unconsolidated real estate ventures | 36,972 | 38,945
Total assets (1) | $ 871,804 | $ 942,257

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 3: 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(a)(12)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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- Definition Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate 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=119400593&loc=d3e572229-122910 + 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=119400593&loc=d3e572229-122910 + Details
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