Document and Entity Information
Document and Entity Information | Nov. 19, 2020 |
Document And Entity Information [Line Items] | |
Amendment Flag | false |
Entity Central Index Key | 0000039263 |
Current Fiscal Year End Date | --12-31 |
Document Type | 8-K |
Document Period End Date | Nov. 19, 2020 |
Entity Registrant Name | Cullen/Frost Bankers, Inc. |
Entity Incorporation State Country Code | TX |
Entity File Number | 001-13221 |
Entity Tax Identification Number | 74-1751768 |
Entity Address, Address Line One | 111 West Houston Street |
Entity Address, City or Town | San Antonio |
Entity Address, State or Province | TX |
Entity Address, Postal Zip Code | 78205 |
City Area Code | (210) |
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 |
Common Stock [Member] | |
Document And Entity Information [Line Items] | |
Security 12b Title | Common Stock, $.01 Par Value |
Trading Symbol | CFR |
Security Exchange Name | NYSE |
Series B Preferred Stock [Member] | |
Document And Entity Information [Line Items] | |
Security 12b Title | 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 |