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Summary of Significant Accounting Policies - Narrative and Additional Information (Details) |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 30, 2020 | Jun. 30, 2020 | Oct. 05, 2018 USD ($) | Dec. 31, 2020 USD ($) jointVenture | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 24, 2020 | Jun. 05, 2019 | Jan. 01, 2019 USD ($) | Dec. 31, 2017 USD ($)
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Construction costs capitalization period after substantially complete |  |  |  | 1 year |  |  |  |  |  |
Capitalized personnel costs |  |  |  | $ 15,843,000 | $ 9,218,000 | $ 12,233,000 |  |  |  |
Capitalized interest |  |  |  | 19,509,000 | 16,258,000 | 14,815,000 |  |  |  |
Impairment charges |  |  |  | 0 | 52,201,000 | 0 |  |  |  |
Impairment of goodwill |  |  |  | 0 | 0 | 0 |  |  |  |
Gross unrealized gains |  |  |  | 5,200,000 |  |  |  |  |  |
Gross unrealized losses |  |  |  | 0 |  |  |  |  |  |
Accounts receivable |  |  |  | 22,100,000 | 13,000,000.0 |  |  |  |  |
Accounts receivable, allowance for doubtful accounts |  |  |  | 0 | 0 |  |  |  |  |
Straight-line rent receivables |  |  |  | 226,000,000.0 | 195,300,000 |  |  |  |  |
Straight-line rent receivables, allowance for doubtful accounts |  |  |  | 300,000 | 0 |  |  |  |  |
Unrealized gain (loss) on non-real estate investments |  |  |  | $ (2,463,000) | 0 | 928,000 |  |  |  |
Weighted average incremental borrowing rate |  |  |  | 5.70% |  |  |  |  |  |
Weighted average remaining lease term |  |  |  | 31 years |  |  |  |  |  |
Equity |  |  |  | $ (3,967,980,000) | (3,709,362,000) | (3,830,130,000) |  |  |  | $ (3,910,964,000)
Income tax expense |  |  |  | $ 0 |  |  |  |  |  |
Hollywood Media Portfolio |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership percentage sold | 49.00% | 49.00% |  |  |  |  |  |  |  |
Percentage ownership retained | 51.00% |  |  |  |  |  |  |  |  |
VIE, primary beneficiary |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Number of joint ventures meeting the VIE definition | jointVenture |  |  |  | 14 |  |  |  |  |  |
Number of joint ventures consolidated | jointVenture |  |  |  | 12 |  |  |  |  |  |
VIE, primary beneficiary | Hudson 1455 Market, L.P. |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
VIE, ownership percentage |  |  |  | 55.00% |  |  |  |  |  |
VIE, primary beneficiary | Hudson 1099 Stewart, L.P. |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
VIE, ownership percentage |  |  |  | 55.00% |  |  |  |  |  |
VIE, primary beneficiary | HPP-MAC WSP, LLC |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
VIE, ownership percentage |  |  |  | 75.00% |  |  |  |  |  |
VIE, primary beneficiary | Hudson One Ferry REIT, L.P. |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
VIE, ownership percentage |  |  |  | 55.00% |  |  |  |  |  |
VIE, primary beneficiary | Sunset Bronson Entertainment Properties, LLC |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
VIE, ownership percentage |  |  |  | 51.00% |  |  |  |  |  |
VIE, primary beneficiary | Sunset Gower Entertainment Properties, LLC |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
VIE, ownership percentage |  |  |  | 51.00% |  |  |  |  |  |
VIE, primary beneficiary | Sunset Las Palmas Entertainment Properties, LLC |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
VIE, ownership percentage |  |  |  | 51.00% |  |  |  |  |  |
VIE, primary beneficiary | Sunset Services Holdings, LLC |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
VIE, ownership percentage |  |  |  | 51.00% |  |  |  |  |  |
VIE, primary beneficiary | Sunset Studios Holdings, LLC |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
VIE, ownership percentage |  |  |  | 51.00% |  |  |  |  |  |
VIE, primary beneficiary | Hudson Media and Entertainment Management, LLC |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
VIE, ownership percentage |  |  |  | 51.00% |  |  |  |  |  |
VIE, primary beneficiary | Hudson 6040 Sunset, LLC |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
VIE, ownership percentage |  |  |  | 51.00% |  |  |  |  |  |
VIE, primary beneficiary | Hudson 1918 Eighth, L.P. |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
VIE, ownership percentage |  |  |  | 55.00% |  |  |  |  |  |
VIE, not primary beneficiary |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Number of joint ventures not consolidated | jointVenture |  |  |  | 2 |  |  |  |  |  |
(Accumulated Deficit) Retained Earnings |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Equity |  |  |  | $ 0 | 0 | 0 |  |  |  | $ 0
Cumulative Effect, Period of Adoption, Adjustment | (Accumulated Deficit) Retained Earnings |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Equity |  |  |  |  |  |  |  |  | $ 1,800,000 |
ASU 2016-02 (ASC 842) |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Accumulated deficit |  |  |  |  |  |  |  |  | $ 300,000 |
ASU 2016-02 (ASC 842) | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Equity |  |  |  |  |  | 2,105,000 |  |  |  |
ASU 2016-02 (ASC 842) | Cumulative Effect, Period of Adoption, Adjustment | (Accumulated Deficit) Retained Earnings |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Equity |  |  |  |  |  | $ 2,105,000 |  |  |  |
Joint Venture Sun Valley Property |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Joint venture, ownership percentage |  |  |  | 50.00% |  |  | 50.00% |  |  |
Joint Venture, Blackstone |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Joint venture, ownership percentage |  |  |  | 20.00% |  |  |  | 20.00% |  |
Non Real Estate Investment That Does Not Report NAV |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Unrealized gain (loss) on non-real estate investments |  |  |  | $ (1,600,000) | 0 |  |  |  |  |
Unrealized loss, cumulative |  |  |  | 600,000 |  |  |  |  |  |
Real Estate Technology Venture Capital Fund |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Unrealized gain (loss) on non-real estate investments |  |  |  | (900,000) | $ 0 |  |  |  |  |
Commitment to fund amount |  |  | $ 20,000,000.0 |  |  |  |  |  |  |
Contributions to date |  |  |  | 4,200,000 |  |  |  |  |  |
Amount remaining to be contributed |  |  |  | 15,800,000 |  |  |  |  |  |
Cumulative unrealized gain (loss), entities that report NAV |  |  |  | $ (900,000) |  |  |  |  |  |
Building and improvements |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  | 39 years |  |  |  |  |  |
Land improvements |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  | 15 years |  |  |  |  |  |
Furniture and fixtures | Minimum |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  | 5 years |  |  |  |  |  |
Furniture and fixtures | Maximum |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful life |  |  |  | 7 years |  |  |  |  |  |

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