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Document And Entity Information
Jul. 30, 2025
Document Information Line Items  
Entity Central Index Key 0001370755
Document Type 8-K
Document Period End Date Jul. 30, 2025
Entity Registrant Name BlackRock TCP Capital Corp.
Entity Incorporation, State or Country Code DE
Entity File Number 814-00899
Entity Tax Identification Number 56-2594706
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, par value $0.001 per share
Trading Symbol TCPC
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Amendment Flag false