Agreements and Related Party Transactions - Management Fee Agreement (Details) - USD ($) $ in Thousands	Sep. 02, 2025	Sep. 30, 2025	Dec. 31, 2024	[1]
Related Party Transaction [Line Items]
Total Net Assets		$ 344,077	$ 142,256
Management And Services Fees, Range One | Minimum | Expense Support Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	0.50%
Management And Services Fees, Range One | Minimum | Management Fee Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	0.1125%
Management And Services Fees, Range One | Maximum | Expense Support Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	2.00%
Total Net Assets	$ 150,000
Management And Services Fees, Range One | Maximum | Management Fee Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	1.35%
Total Net Assets	$ 150,000
Management And Services Fees Range Two | Minimum | Expense Support Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	0.4375%
Total Net Assets	$ 150,000
Management And Services Fees Range Two | Minimum | Management Fee Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	0.0917%
Total Net Assets	$ 150,000
Management And Services Fees Range Two | Maximum | Expense Support Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	1.75%
Total Net Assets	$ 200,000
Management And Services Fees Range Two | Maximum | Management Fee Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	1.10%
Total Net Assets	$ 300,000
Management And Services Fees Range Three | Minimum | Expense Support Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	0.375%
Total Net Assets	$ 200,000
Management And Services Fees Range Three | Minimum | Management Fee Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	0.0823%
Total Net Assets	$ 300,000
Management And Services Fees Range Three | Maximum | Expense Support Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	1.50%
Total Net Assets	$ 250,000
Management And Services Fees Range Three | Maximum | Management Fee Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	0.9875%
Total Net Assets	$ 500,000
Management And Services Fees Range Four | Minimum | Expense Support Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	0.3375%
Total Net Assets	$ 250,000
Management And Services Fees Range Four | Minimum | Management Fee Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	0.071%
Total Net Assets	$ 500,000
Management And Services Fees Range Four | Maximum | Expense Support Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	1.35%
Total Net Assets	$ 300,000
Management And Services Fees Range Four | Maximum | Management Fee Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Expense Cap	0.85%

[1] As of December 31, 2024, Crestline Lending Solutions, LLC (the “Company”) had not yet elected to be regulated as a business development company (“BDC”), and was operating as Crestline Lending Solutions Ramp, LLC (the “Ramp Vehicle”), a private fund based on an exception from the definition of "investment company" under Section 3(c)(7) of the Investment Company Act of 1940, as amended (the “1940 Act”).