v3.26.3
Document And Entity Information Document
Oct. 21, 2026
Entity Information [Line Items]  
Entity Registrant Name TEXAS CAPITAL BANCSHARES INC/TX
Entity Emerging Growth Company false
Entity Incorporation, State or Country Code DE
Written Communications false
Document Type 8-K
Document Period End Date Oct. 21, 2026
Entity Address, Address Line One 2000 McKinney Avenue
Entity Address, Address Line Two Suite 700
Entity Address, City or Town Dallas
Entity Address, State or Province TX
Entity Address, Postal Zip Code 75201
City Area Code (214)
Local Phone Number 932-6600
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity File Number 001-34657
Entity Tax Identification Number 75-2679109
Entity Central Index Key 0001077428
Amendment Flag false
Common Stock [Member]  
Entity Information [Line Items]  
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol TCBI
Series B Preferred Stock  
Entity Information [Line Items]  
Title of 12(b) Security Depositary Shares Each Representing a 1/40th Interest in a Share of 5.75% Fixed-Rate Non-Cumulative Perpetual Preferred Stock, Series B
Trading Symbol TCBI PRB