v3.25.4

Transaction and Other Costs (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Transaction and Other Costs. |  |  |
Completed, potential and pursued transaction expenses | $ 2,940 | $ 2,340 | $ 1,625
Severance and other costs | 2,737 | 2,333 | 4,491
Demolition costs | 546 | 644 | 2,621
Transaction and other costs | $ 6,223 | $ 5,317 | $ 8,737

X
- Definition Amount of expenses associated with completed, potential and integrated transactions. + References No definition available. + Details
Name: | jbgs_CompletedPotentialIntegratedTransactionCosts
Namespace Prefix: | jbgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expenses associated with demolition. + References No definition available. + Details
Name: | jbgs_DemolitionCosts
Namespace Prefix: | jbgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of severance and other costs + References No definition available. + Details
Name: | jbgs_SeveranceAndOtherCosts
Namespace Prefix: | jbgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Transaction And Other Costs + References No definition available. + Details
Name: | jbgs_TransactionAndOtherCosts
Namespace Prefix: | jbgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OtherIncomeAndExpensesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration