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Related Party Transaction, Dividend Fee as Percent of Sale Price of Real Estate

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Amount of obligations incurred and payable classified as other.

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Base rate for management and service fees under arrangement to manage operations, including, but not limited to, investment.

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Rate based on performance for management and service fees under arrangement to manage operations, including, but not limited to, investment.

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Net rentable area for properties owned.

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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

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RELATED PARTY TRANSACTIONS - Additional Information (Details)									1 Months Ended	3 Months Ended
	Feb. 06, 2025	Dec. 20, 2024	Nov. 22, 2024	Aug. 12, 2024 USD ($) $ / ft²	Nov. 08, 2022	Oct. 01, 2022 USD ($)	Jul. 18, 2019 USD ($)	Mar. 14, 2019 USD ($) $ / ft²	Dec. 31, 2023 USD ($)	Mar. 31, 2025 USD ($) property	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)	Oct. 11, 2024 USD ($)	Sep. 30, 2022 USD ($)	May 29, 2015 ft²
Related Party Transaction [Line Items]
Restricted cash										$ 14,257,000		$ 11,090,000
Payable as of										19,386,000		19,520,000
Rental income										$ 60,264,000	$ 65,357,000
KBS Capital Advisors LLC or Affiliates
Related Party Transaction [Line Items]
Selling commissions fees, percent of sales price										1.00%
KBS Capital Advisors LLC, Affiliates or Unaffiliated Third Parties \| Maximum
Related Party Transaction [Line Items]
Selling commissions fees, percent of sales price										6.00%
Related Party
Related Party Transaction [Line Items]
Monthly asset management fee, percent of acquisition expense, excluding acquisition fees related to thereto (percent)										0.0625%
Rental income										$ 69,000	83,000
Related Party \| Subsidiaries
Related Party Transaction [Line Items]
Net rentable area (in sq feet) \| ft²															5,046
Total rentable square feet (percentage)															2.40%
Annualized base rent				$ 300,000				$ 300,000
Average annualized base rent per square foot (usd per sqft) \| $ / ft²				53.75				62.55
Amended and Restated Portfolio Loan Facility
Related Party Transaction [Line Items]
Debt instrument, covenant, deferred asset management fee payment, percentage	0.10
Advisor and Dealer Manager
Related Party Transaction [Line Items]
Incurred costs (reimbursement)										4,695,000	5,475,000
Advisor and Dealer Manager \| Related Party
Related Party Transaction [Line Items]
Payable as of										$ 19,386,000		19,520,000
SREIT
Related Party Transaction [Line Items]
Acquisition fee as percent of acquisition price of real estate							1.00%
Dividend fee as percent of sale price of real estate							0.50%
Development management fee as percent of total project cost							3.00%
SREIT \| Linda Bren 2017 Trust
Related Party Transaction [Line Items]
Investment in an unconsolidated entity							$ 5,000,000
SREIT \| Related Party
Related Party Transaction [Line Items]
Annual base fee (percent)							10.00%
Annual performance fee (percent)							25.00%
Carillon, 515 Congress, Gateway Tech Center, 201 17th Street, and Accenture Tower
Related Party Transaction [Line Items]
Debt instrument, covenant, maximum asset management fee payment, associated properties, number \| property										5
Debt instrument, covenant, maximum asset management fee payment, percentage			0.90
Debt instrument, covenant, deferred asset management fee payment, percentage			0.10
Accenture Tower
Related Party Transaction [Line Items]
Debt instrument, covenant, deferred asset management fee payment, percentage		0.10
Incurred costs of supplemental coverage \| Advisor and Dealer Manager
Related Party Transaction [Line Items]
Incurred costs (reimbursement)										$ 0	0
Monthly asset management cash fee \| Advisor and Dealer Manager
Related Party Transaction [Line Items]
Incurred costs (reimbursement)						$ 1,150,000
Fully funded bonus retention funded \| Advisor and Dealer Manager
Related Party Transaction [Line Items]
Incurred costs (reimbursement)									$ 8,500,000
Bonus retention fund deposit \| Advisor and Dealer Manager \| Related Party
Related Party Transaction [Line Items]
Restricted cash										8,500,000
Payable as of										8,500,000		8,500,000
Bonus retention fund payments \| Advisor and Dealer Manager
Related Party Transaction [Line Items]
Incurred costs (reimbursement)										0
Deferred asset management fees \| Advisor and Dealer Manager
Related Party Transaction [Line Items]
Payable as of														$ 8,500,000
Deferred asset management fees \| Advisor and Dealer Manager \| Related Party
Related Party Transaction [Line Items]
Payable as of										8,500,000		8,500,000
Asset management fees \| Related Party
Related Party Transaction [Line Items]
Payable as of												1,600,000
Asset management fees \| Advisor and Dealer Manager
Related Party Transaction [Line Items]
Incurred costs (reimbursement)										4,584,000	4,943,000
Asset management fees \| Advisor and Dealer Manager \| Related Party
Related Party Transaction [Line Items]
Payable as of										$ 18,830,000		18,585,000
Non compounded return on net invested capital \| Advisor and Dealer Manager
Related Party Transaction [Line Items]
Related party transaction rate (percent)										8.00%
The renewal advisory agreement \| Advisor and Dealer Manager \| Related Party
Related Party Transaction [Line Items]
Renewal period					1 year
Termination period					60 days
Assets Management Fees, Accrued in March 2025 Subsequently Paid in April 2025 \| Advisor and Dealer Manager \| Related Party
Related Party Transaction [Line Items]
Payable as of										$ 1,400,000
Asset Management Fees Deferred in Connection with Agreements Related to the Refinancing of the Company’s Debt Obligations \| Advisor and Dealer Manager \| Related Party
Related Party Transaction [Line Items]
Payable as of										400,000
Disposition Fees \| Advisor and Dealer Manager
Related Party Transaction [Line Items]
Incurred costs (reimbursement)										0	$ 414,000
Disposition Fees \| Advisor and Dealer Manager \| Related Party
Related Party Transaction [Line Items]
Payable as of										$ 500,000		$ 500,000	$ 500,000
Disposition Fees \| Carillon, 515 Congress, Gateway Tech Center, 201 17th Street, and Accenture Tower \| Advisor and Dealer Manager \| Related Party
Related Party Transaction [Line Items]
Selling commissions fees maximum reduction, percent of sales price			0.0065
Disposition Fees \| Portfolio Loan Properties, Accenture Tower, The Almaden \| Advisor and Dealer Manager \| Related Party
Related Party Transaction [Line Items]
Selling commissions fees maximum reduction, percent of sales price	0.0065