| Cover | Feb. 27, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 27, 2024 |
| Entity File Number | 001-41572 |
| Entity Registrant Name | Star Holdings |
| Entity Incorporation, State or Country Code | MD |
| Entity Tax Identification Number | 37-6762818 |
| Entity Address, Address Line One | 1114 Avenue of the Americas |
| Entity Address, Address Line Two | 39th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10036 |
| City Area Code | 212 |
| Local Phone Number | 930-9400 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common shares of beneficial interest, $0.001 par value |
| Trading Symbol | STHO |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | true |
| Entity Central Index Key | 0001953366 |
| Amendment Flag | false |
