Commitments & Contingencies - Schedule of Unfunded Commitment (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	$ 615,858	$ 440,842
Remaining Commitment	154,792	127,857
Investment, Identifier [Axis]: 188 West St James Owner, LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	63,812
Remaining Commitment	21,054
Investment, Identifier [Axis]: 1915 WBP Owner, LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	11,255
Remaining Commitment	910
Investment, Identifier [Axis]: 26 W 9th Street LLC, Mezzanine, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	2,801	2,801
Remaining Commitment	467	908
Investment, Identifier [Axis]: 26 W 9th Street LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	25,210	25,210
Remaining Commitment	5,387	8,596
Investment, Identifier [Axis]: 300 Pressler Street Owner, LLC, Mezzanine, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	2,218
Remaining Commitment	2,095
Investment, Identifier [Axis]: 300 Pressler Street Owner, LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	11,489
Remaining Commitment	10,849
Investment, Identifier [Axis]: 50 West BSP Owner LLC, Mezzanine, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	2,656	2,656
Remaining Commitment	75	110
Investment, Identifier [Axis]: 50 West BSP Owner LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	44,107	44,107
Remaining Commitment	1,242	1,827
Investment, Identifier [Axis]: 6304 Sheriff Road LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	40,350
Remaining Commitment	3,599
Investment, Identifier [Axis]: AREIT RE 1505 Exchange LLC & AREIT RE Woodlands LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	38,000
Remaining Commitment	4,000
Investment, Identifier [Axis]: AVR Eugene Hotel LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment		12,598
Remaining Commitment		3,629
Investment, Identifier [Axis]: Blue Suede Hospitality Group, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	19,510	19,510
Remaining Commitment	1,174	1,174
Investment, Identifier [Axis]: Creekside Logistics Center Owner, LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	14,701
Remaining Commitment	4,491
Investment, Identifier [Axis]: GVP TC Wilmer Property Owner, LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	46,027	46,027
Remaining Commitment	6,874	8,949
Investment, Identifier [Axis]: Grand Cypress Apartments, LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	50,000	50,000
Remaining Commitment	772	1,516
Investment, Identifier [Axis]: Hallandale Oasis 2019 LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	19,837	23,098
Remaining Commitment	13,268	16,711
Investment, Identifier [Axis]: Insite Orlando Two, LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	22,795	22,795
Remaining Commitment	6,928	7,726
Investment, Identifier [Axis]: Olymbec Viscount LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	8,819	8,819
Remaining Commitment	460	460
Investment, Identifier [Axis]: Paraiso 256, LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	29,896	29,896
Remaining Commitment	450	2,885
Investment, Identifier [Axis]: Rise Bridgeview, LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	12,724	12,724
Remaining Commitment	1,987	1,987
Investment, Identifier [Axis]: Rise Stone Gate, LLC & Artic Investments, LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	9,050
Remaining Commitment	1,465
Investment, Identifier [Axis]: S2 Pleasantdale LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	22,809	22,809
Remaining Commitment	3,534	4,731
Investment, Identifier [Axis]: SL 418, LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	48,701	48,701
Remaining Commitment	719	904
Investment, Identifier [Axis]: WHK Waterfront Mezz LLC, Mezzanine, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment		19,091
Remaining Commitment		19,091
Investment, Identifier [Axis]: WHK Waterfront Urban Renewal LLC, Mezzanine, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	19,091
Remaining Commitment	16,576
Investment, Identifier [Axis]: WHK Waterfront Urban Renewal LLC, Senior Mortgage, Delayed Draw
Financial Support for Nonconsolidated Legal Entity [Line Items]
Total Commitment	50,000	50,000
Remaining Commitment	$ 46,416	$ 46,653

Franklin BSP Real Estate Debt BDC 10-Q