v3.25.1
N-2 - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Cover [Abstract]    
Entity Central Index Key 0001944831  
Amendment Flag false  
Securities Act File Number 814-01698  
Document Type 10-Q  
Entity Registrant Name Willow Tree Capital Corporation  
Entity Address, Address Line One 450 Park Avenue  
Entity Address, Address Line Two 29th Floor  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10022  
City Area Code 212  
Local Phone Number 218-1090  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Financial Highlights [Abstract]    
Senior Securities [Table Text Block]
Information about the Company’s senior securities (including debt securities and other indebtedness) is shown in the following tables as of the end of the last fiscal year.The “-” indicates information that the SEC expressly does not require to be disclosed for certain types of senior securities.
Class and YearTotal Amount Outstanding (1)Asset Coverage Per Unit (2) Involuntary Liquidating Preference Per Unit (3)  Average Market Value Per Unit (4)
Credit Facility
March 31, 2025$314,394,000 $1,803 $— N/A
Subscription Line
March 31, 2025$50,450,000 $1,803 $— N/A
(1)Total amount of each class of senior securities outstanding at principal value at the end of the period presented.
(2)Asset coverage per unit is the ratio of the principal balance of the Company’s total consolidated assets, less all liabilities and indebtedness not represented by senior securities, divided by the aggregate amount of senior securities representing indebtedness. This asset coverage ratio is multiplied by $1,000 to determine the “Asset Coverage Per Unit”.
(3)The amount to which such class of senior security would be entitled upon the Company’s involuntary liquidation in preference to any security junior to it.
(4)Not applicable because senior securities are not registered for public trading on a stock exchange.
 
General Description of Registrant [Abstract]    
NAV Per Share $ 16.25 $ 15.76
A&R Credit Facility [Member]    
Financial Highlights [Abstract]    
Senior Securities Amount $ 314,394  
Senior Securities Coverage per Unit $ 1,803  
Subscription Facility [Member]    
Financial Highlights [Abstract]    
Senior Securities Amount $ 50,450  
Senior Securities Coverage per Unit $ 1,803