v3.26.1
Related Party Transactions - Additional Information (Details) - USD ($)
 3 Months Ended 6 Months Ended
May 03, 2026
May 02, 2026
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Related Party Transaction [Line Items]              
Management fees     $ 1,472,000 $ 1,020,000 $ 2,922,000 $ 1,857,000  
Management fee     $ 1,472,000   $ 1,472,000   $ 1,443,000
Percentage of quarterly incentive rate     1.25%   1.25%    
Percentage of annual incentive rate     5.00%   5.00%    
Percentage of pre-incentive fee net investment income returns     100.00%   100.00%    
Percentage of hurdle rate exceeds rate of return     1.43%   1.43%    
Percentage of hurdle rate exceeds rate of return annually     5.72%   5.72%    
Percentage of hurdle rate exceeds rate of return quarterly     1.43%   1.43%    
Administration fee expense     $ 170,000 $ 202,000 $ 460,000 $ 370,000  
Common Stock              
Related Party Transaction [Line Items]              
Shares Issued     397,852 3,566,456 397,852 6,336,024  
Class S Shares              
Related Party Transaction [Line Items]              
Percentage of net asset value annualized     0.85%   0.85%    
Class D Shares              
Related Party Transaction [Line Items]              
Percentage of net asset value annualized     0.25%   0.25%    
Class F Shares              
Related Party Transaction [Line Items]              
Percentage of net asset value annualized     0.50%   0.50%    
Multi Class Order | Common Stock              
Related Party Transaction [Line Items]              
Shares Issued         0    
Investment Advisory Agreement              
Related Party Transaction [Line Items]              
Percentage of annual rate of net assets     1.25%   1.25%    
Management fees     $ 1,471,900 $ 1,020,400 $ 2,922,200 $ 1,857,000  
Percentage of pre-incentive fee net investment income returns     12.50%   12.50%    
Percentage of pre incentive fee net investment income returns paid     12.50%   12.50%    
Percentage of hurdle rate exceeds rate of return     1.43%   1.43%    
Percentage of hurdle rate exceeds rate of return annually     5.72%   5.72%    
Incentive fee expense related to pre incentive fee net investment income returns     $ 1,572,000 1,141,300 $ 3,253,000 1,952,000  
Reserved prior accruals of incentive fee related to capital gain incentive fee       301,700   188,700  
Incentive fee expense related to capital gains incentive fee     (0)   (107,400)    
Payable related to pre-incentive fee net investment income returns     1,570,500   1,570,500   1,332,700
Payable related to incentive fees related to capital gains incentive fee     $ 0   $ 0   107,400
Percentage of cumulative realized capital gains     12.50%   12.50%    
Administration Agreement              
Related Party Transaction [Line Items]              
Percentage of fee on rate of net assets per annum to be paid to administrator 0.06%            
Administration Agreement | John Hancock Investment Management LLC              
Related Party Transaction [Line Items]              
Administration fee expense     $ 47,700   $ 47,700    
Administration Agreement | AMG Funds LLC              
Related Party Transaction [Line Items]              
Administration fee expense     $ 121,900 $ 202,700 $ 411,900 $ 370,400  
Prior Administration Agreement              
Related Party Transaction [Line Items]              
Percentage of fee on rate of net assets per annum to be paid to administrator   0.25%          
Four Amended And Restated Expense Limitation And Reimbursement Agreement              
Related Party Transaction [Line Items]              
Percentage of quarterly incentive rate     1.25%   1.25%    
Written notice period         30 days    
Cumulative reimbursement by the Investment Adviser     $ 0   $ 0    
Amount owed in expense reimbursement     0   0   1,437,000
Cumulative reimbursement by the investment adviser including recopment of prior years reimbursements     264,000   9,000    
Recoupment amount of prior years reimbursements     9,000   9,000    
Amount owed by the investment advisor     $ 265,000   $ 265,000   $ 0