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Leases - Additional Information (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Sep. 24, 2021 USD ($) | Dec. 31, 2021 USD ($) Agreement | Dec. 31, 2020 USD ($) Item Agreement | Dec. 31, 2019 USD ($)
Operating Leased Assets [Line Items] |  |  |  |
Variable lease revenues |  | $ 58,300 | $ 57,100 |
Payments to Tenant | $ 5,400 |  |  |
Part payment received from tenant | $ 300 |  |  |
Lease agreement purchase price |  |  | 14,500 |
Operating lease right-of-use asset |  | 40,743 | 76,268 | $ 60,000
Lease liability - operating lease |  | 38,759 | 88,816 | 58,000
Gain (loss) on termination of lease |  | 3,615 | 0 | 0
Gain on disposition of properties |  | 10,521 | 683 | 30,324
Net income |  | 26,030 | (65,718) | 23,234
Impairment charges |  | 9,925 | 85,598 | $ 1,721
COVID-19 |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Net income |  | 16,300 | 134,000 |
Pro rata earnings |  | 8,600 | 53,100 |
Aggregate credit losses and rent abatements |  | 6,400 | 48,400 |
Pro rata credit losses and rent abatements |  | 6,300 | 32,500 |
Impairment charges |  | 9,900 | 85,600 |
Pro rata asset impairment charges |  | $ 2,300 | $ 20,600 |
Number of rent concession agreements | Agreement |  | 96 | 288 |
Number of rent concession agreements for rent deferral | Agreement |  | 18 | 226 |
Number of rent concession agreements for rent abatements | Agreement |  | 78 | 60 |
Number of rent concession agreements accounted as no change in contract | Agreement |  | 16 |  |
Deferred receivables |  | $ 5,400 | $ 10,600 |
Rent abatements |  | 6,500 | 1,900 |
Pro rata rent abatement |  | $ 4,300 | $ 2,600 |
Pro rata core leased occupancy rate percentage |  | 93.20% | 90.90% |
Pro rata fund leased occupancy rate percentage |  | 91.40% | 88.30% |
COVID-19 | Core Portfolio |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Percentage of rent collections |  | 98.00% | 91.00% |
COVID-19 | Opportunity Funds |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Percentage of rent collections |  | 94.00% | 82.00% |
Fund IV Property |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Operating lease right-of-use asset |  | $ 31,400 |  |
Termination cost |  | 3,600 |  |
Lease liability - operating lease |  | 46,000 |  |
Building improvements and other assets |  | 10,300 |  |
Gain (loss) on termination of lease |  | 700 |  |
Gain on disposition of properties |  | 200 |  |
Impairment charge of right-of-use asset |  |  | $ 12,300 |
BSP II |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Number of operating lease | Item |  |  | 1 |
Branch Plaza |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Number of operating lease | Item |  |  | 1 |
Operating Lease term |  |  | 22 years |
1238 Wisconsin |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Lease agreement purchase price |  |  | $ 11,500 |
Operating lease right-of-use asset |  |  | 1,900 |
Operating lease liability |  |  | $ 1,900 |
Accounting Standards Update 2016-02 | 991 Madison Avenue Manhattan, NY |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Capital lease term |  |  | 49 years |
Operating Lease term |  |  | 15 years |
Office Lease |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Number of operating lease | Item |  |  | 1 |
Operating lease right-of-use asset |  |  | $ 1,700 |
Lease liability - operating lease |  |  | $ 1,700 |
Rye Corporate Office Lease |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Operating lease right-of-use asset |  | 400 |  |
Operating lease liability |  | $ 400 |  |
Minimum |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Operating lease term |  | 1 month |  |
Minimum | Consolidated Total Revenues | Customer Concentration Risk |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Concentration risk, percentage |  | 10.00% | 10.00% | 10.00%
Maximum |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |
Operating lease term |  | 60 years |  |

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