N-2 - $ / shares |
9 Months Ended | |||
|---|---|---|---|---|
Sep. 30, 2026 |
Dec. 31, 2025 |
Sep. 30, 2025 |
Dec. 31, 2024 |
|
| Cover [Abstract] | ||||
| Entity Central Index Key | 0002006758 | |||
| Amendment Flag | false | |||
| Securities Act File Number | 814-01710 | |||
| Document Type | 10-Q | |||
| Entity Registrant Name | MIDCAP APOLLO INSTITUTIONAL PRIVATE LENDING | |||
| Entity Address, Address Line One | 9 West 57th Street | |||
| Entity Address, City or Town | New York | |||
| Entity Address, State or Province | NY | |||
| Entity Address, Postal Zip Code | 10019 | |||
| City Area Code | 212 | |||
| Local Phone Number | 515-3200 | |||
| Entity Emerging Growth Company | true | |||
| Entity Ex Transition Period | false | |||
| General Description of Registrant [Abstract] | ||||
| Risk Factors [Table Text Block] | Item 1A. Risk Factors In addition to the other information set forth in this report and below, you should carefully consider the factors discussed in “Item 1A. Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2025 and in Part II, “Item 1A. Risk Factors” in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2026, which could materially affect our business, financial condition and/or operating results. These risks are not the only risks facing our Company. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially and adversely affect our business, financial condition and/or operating results. There may be conflicts of interest in the Company's valuation process. The Investment Adviser and its affiliates may have economic interests that are affected by the valuations they produce, including interests arising from management fees calculated on the basis of NAV, performance-based compensation and other fee arrangements, which are based upon valuations that take into account income or gains that have been accrued but not received in cash, including but not limited to market discounts, debt instruments with payment in kind (“PIK”) interest, preferred stock with PIK dividends and zero coupon securities, in addition to amounts related to unrealized capital appreciation. In the event that a borrower defaults or an investment otherwise decreases in value, such unrealized amounts may never become realized. The Investment Adviser is not obligated to reimburse the Company for any part of fees received that were based on unrealized gains that never materialized, which could result in higher fees than if such fees were based solely on realized gains. These interests may create an incentive for the Investment Adviser to produce valuation information that differs from what an independent third party might determine. The Investment Adviser has implemented internal valuation governance procedures, including oversight by a valuation committee, intended to mitigate these conflicts; however, there can be no assurance that such procedures will eliminate conflicts. |
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| NAV Per Share | $ 22.29 | $ 23.24 | $ 23.65 | $ 24.43 |