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Real Estate (Schedule of Real Estate Assets) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Real Estate Properties [Line Items] |  |  |
Less: accumulated depreciation | [1] | $ (278,985) | $ (267,772)
Real estate, net | [1] | 1,474,393 | 1,484,281
Real estate available and held for sale | [1] | 2,600 | 5,212
Total real estate | [1] | 1,476,993 | 1,489,493
Net Lease |  |  |
Real Estate Properties [Line Items] |  |  |
Land, at cost |  | 188,418 | 188,418
Buildings and improvements, at cost |  | 1,354,952 | 1,353,683
Less: accumulated depreciation |  | (260,288) | (250,198)
Real estate, net |  | 1,283,082 | 1,291,903
Real estate available and held for sale |  | 0 | 0
Total real estate |  | 1,283,082 | 1,291,903
Net Lease | iStar Net Lease I LLC |  |  |
Real Estate Properties [Line Items] |  |  |
Real estate, net |  | 751,400 | 755,500
Operating Properties |  |  |
Real Estate Properties [Line Items] |  |  |
Land, at cost |  | 103,530 | 103,530
Buildings and improvements, at cost |  | 106,478 | 106,422
Less: accumulated depreciation |  | (18,697) | (17,574)
Real estate, net |  | 191,311 | 192,378
Real estate available and held for sale |  | 2,600 | 5,212
Total real estate |  | 193,911 | 197,590
Real Estate Properties |  |  |
Real Estate Properties [Line Items] |  |  |
Land, at cost |  | 291,948 | 291,948
Buildings and improvements, at cost |  | 1,461,430 | 1,460,105
Less: accumulated depreciation |  | (278,985) | (267,772)
Real estate, net |  | 1,474,393 | 1,484,281
Real estate available and held for sale |  | 2,600 | 5,212
Total real estate |  | 1,476,993 | 1,489,493
Residential Operating Properties |  |  |
Real Estate Properties [Line Items] |  |  |
Real estate available and held for sale |  | $ 2,600 | $ 5,200
[1] | (1)Refer to Note 2 for details on the Company's consolidated variable interest entities ("VIEs").

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- Definition Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements. + 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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