| Document and Entity Information | Nov. 08, 2023 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001633336 |
| Document Type | 8-K |
| Document Period End Date | Nov. 08, 2023 |
| Entity Registrant Name | Crescent Capital BDC, Inc. |
| Entity Incorporation State Country Code | MD |
| Entity File Number | 814-01132 |
| Entity Tax Identification Number | 47-3162282 |
| Entity Address, Address Line One | 11100 Santa Monica Blvd. |
| Entity Address, Address Line Two | Suite 2000 |
| Entity Address, City or Town | Los Angeles |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90025 |
| City Area Code | (310) |
| Local Phone Number | 235-5900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12g Title | Common Stock, $0.001 par value per share |
| Trading Symbol | CCAP |
| Security Exchange Name | NASDAQ |
| Deferrable Notes [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12g Title | 5.00% Notes due 2026 |
| Trading Symbol | FCRX |
| Security Exchange Name | NYSE |
