| Cover | Oct. 25, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 25, 2023 |
| Entity File Number | 001-40564 |
| Entity Registrant Name | Silver Spike Investment Corp. |
| Entity Central Index Key | 0001843162 |
| Entity Tax Identification Number | 86-2872887 |
| Entity Incorporation, State or Country Code | MD |
| Entity Address, Address Line One | 600 Madison Avenue |
| Entity Address, Address Line Two | Suite 1800 |
| 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 | 905-4923 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value per share |
| Trading Symbol | SSIC |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Entity Information, Former Legal or Registered Name | Not Applicable |
