Cover Document
Cover Document | Apr. 28, 2021 | Apr. 29, 2020 |
Document Information [Line Items] | ||
Amendment Flag | false | |
City Area Code | (210) | |
Entity Address, Address Line One | 111 W. Houston Street, | |
Entity Incorporation, State or Country Code | TX | |
Document Type | 8-K | |
Document Period End Date | Apr. 28, 2021 | |
Entity Registrant Name | Cullen/Frost Bankers, Inc. | |
Entity File Number | 001-13221 | |
Entity Tax Identification Number | 74-1751768 | |
Entity Address, City or Town | San Antonio, | |
Entity Address, State or Province | TX | |
Entity Address, Postal Zip Code | 78205 | |
Local Phone Number | 220-4011 | |
Written Communications | false | |
Soliciting Material | false | |
Pre-commencement Tender Offer | false | |
Pre-commencement Issuer Tender Offer | false | |
Entity Emerging Growth Company | false | |
Entity Central Index Key | 0000039263 | |
Series B Preferred Stock | NEW YORK STOCK EXCHANGE, INC. | ||
Document Information [Line Items] | ||
Title of 12(b) Security | Depositary Shares, each representing a 1/40th interest in a share of 4.450% Non-Cumulative Perpetual Preferred Stock, Series B | |
Trading Symbol | CFR.PrB | |
Security Exchange Name | NYSE | |
Common Stock | NEW YORK STOCK EXCHANGE, INC. | ||
Document Information [Line Items] | ||
Title of 12(b) Security | Common Stock, $.01 Par Value | |
Trading Symbol | CFR | |
Security Exchange Name | NYSE |