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Commitments and Contingencies - Circle C Settlement (Details) - USD ($) $ in Millions | 12 Months Ended |
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Dec. 31, 2024 | Aug. 01, 2002
Commitments and Contingencies Disclosure [Abstract] |  |
Development Fee Credits, Amount Per Settlement Agreement |  | $ 15.0
Development Fee Credits, Amount Eligible For Sale Per Year | $ 1.5 |
Development Fee Credits, Cumulative Amount Permanently Used | 12.9 |
Development Fee Credits, Cumulative Amount Sold To Third Parties | 5.1 |
Development Fee Credits, Outstanding Credit Bank Capacity | 0.3 |
Development Fee Credits, Available Credit Bank Capacity | $ 2.3 |

X
- Definition The amount of development fee credits, per settlement agreement with a local municipality, which are eligible for sale, annually, to third parties for use in paying municipal fees related to development projects covered by the settlement agreement. + References No definition available. + Details
Name: | strs_DevelopmentFeeCreditsAmountEligibleForSalePerYear
Namespace Prefix: | strs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total amount of development fee credits, per settlement agreement with a local municipality, which are in the form of Credit Bank capacity, in connection with the future development of properties, for waivers of fees and reimbursement of certain infrastructure costs. + References No definition available. + Details
Name: | strs_DevelopmentFeeCreditsAmountPerSettlementAgreement
Namespace Prefix: | strs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cumulative amount of development fee credits that have permanently used from a settlement agreement with a local municipality. + References No definition available. + Details
Name: | strs_DevelopmentFeeCreditsCumulativeAmountPermanentlyUsed
Namespace Prefix: | strs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cumulative amount of development fee credits, per settlement agreement with a local municipality, that have been sold to third parties for use in paying municipal fees related to development projects covered by the settlement agreement. + References No definition available. + Details
Name: | strs_DevelopmentFeeCreditsCumulativeAmountSoldToThirdParties
Namespace Prefix: | strs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of Credit Bank capacity outstanding as of the balance sheet date. + References No definition available. + Details
Name: | strs_DevelopmentFeeCreditsOutstandingCreditBankCapacity
Namespace Prefix: | strs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of capacity currently available under the Credit Bank agreement (current capacity less the amount in use). + References No definition available. + Details
Name: | strs_DevelopmentFeeCreditsRemainingCreditBankCapacity
Namespace Prefix: | strs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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