v3.25.2
Cover
Jul. 01, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jul. 01, 2025
Entity File Number 814-00899
Entity Registrant Name BLACKROCK TCP CAPITAL CORP.
Entity Central Index Key 0001370755
Entity Tax Identification Number 56-2594706
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 2951 28th Street
Entity Address, Address Line Two Suite 1000
Entity Address, City or Town Santa Monica
Entity Address, State or Province CA
Entity Address, Postal Zip Code 90405
City Area Code 310
Local Phone Number 566-1000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.0001 par value
Trading Symbol TCPC
Security Exchange Name NASDAQ
Entity Emerging Growth Company false