Related Party Transactions (Additional Information) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Termination of agreement, description	The Administration Agreement may be terminated at any time, without the payment of any penalty, upon 60 days’ written notice, by the vote of a majority of the outstanding voting shares of the Company or by the vote of the Board or by the Administrator.
Administrative fees	$ 593,000	$ 603,000	$ 616,000
Management fees expense	1,720,000	1,357,000	1,237,000
Accrued organization and offering costs	0	0	30,000
Administration Agreement [Member]
Related Party Transaction [Line Items]
Administrative fees	$ 600,000	600,000	600,000
Investment Advisory Agreement [Member]
Related Party Transaction [Line Items]
Termination of agreement, description	The Investment Advisory Agreement may be terminated at any time, without the payment of any penalty, upon 60 days’ written notice and, in certain circumstances, upon 120 days’ written notice, by the vote of a majority of the outstanding voting shares of the Company or by the vote of the Board or by the Adviser.
Management fees, description	The base management fee is payable quarterly in arrears at an annual rate of 1.00% (1.50% if an exchange listing occurs) of the Company’s average gross assets, excluding cash and cash equivalents but including assets purchased with borrowed amounts, at the end of the two most recently completed calendar quarters
Management fees expense	$ 1,700,000	1,400,000	1,200,000
Incentive fees, description	the income incentive fee, payable at the end of each quarter in arrears, equals 100% of the pre-incentive fee net investment income in excess of a 1.50% quarterly preferred return but less than 1.76% (1.818% if an exchange listing occurs), the upper level breakpoint, and 15% (17.50% if an exchange listing occurs) of the amount of pre-incentive fee net investment income that exceeds 1.76% (1.818% if an exchange listing occurs) in any calendar quarter.
Percentage of cumulative realized capital gains	15.00%
Incentive fees	$ (1,400,000)	$ (1,200,000)	$ (1,100,000)
Organization and Offering Costs [Member]
Related Party Transaction [Line Items]
Organization and portfolio offering costs rate	1.50%
Accrued organization and offering costs	$ 1,400,000

BC Partners Lending Corp 10-K