Cover
Cover | Feb. 23, 2022 |
Cover [Abstract] | |
Document Type | 8-K |
Amendment Flag | false |
Document Period End Date | Feb. 23, 2022 |
Entity File Number | 000-09439 |
Entity Registrant Name | INTERNATIONAL BANCSHARES CORPORATION |
Entity Central Index Key | 0000315709 |
Entity Tax Identification Number | 74-2157138 |
Entity Incorporation, State or Country Code | TX |
Entity Address, Address Line One | 1200 San Bernardo |
Entity Address, City or Town | Laredo |
Entity Address, State or Province | TX |
Entity Address, Postal Zip Code | 78040-1359 |
City Area Code | 956 |
Local Phone Number | 722-7611 |
Written Communications | false |
Soliciting Material | false |
Pre-commencement Tender Offer | false |
Pre-commencement Issuer Tender Offer | false |
Title of 12(b) Security | Common Stock, $1.00 par value |
Trading Symbol | IBOC |
Security Exchange Name | NASDAQ |
Entity Emerging Growth Company | false |