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International Bancshares Corporation (Parent Company Only) Financial Information Statements of Cash Flows | 12 Months Ended
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Dec. 31, 2021
International Bancshares Corporation (Parent Company Only) Financial Information Statements of Cash Flows | (23) International Bancshares Corporation (Parent Company Only) Financial Information Statements of Cash Flows (Parent Company Only) Years ended December 31, 2021, 2020 and 2019 (Dollars in Thousands) ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019 |
Operating activities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ | $ | 253,922 | ​ | $ | 167,319 | ​ | $ | 205,104 | ​
Adjustments to reconcile net income to net cash provided by operating activities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Provision for credit loss | ​ | ​ | — | ​ | ​ | 27 | ​ | ​ | — | ​
Unrealized (gain) loss on equity securities with readily determinable fair values | ​ | ​ | (51) | ​ | ​ | 22 | ​ | ​ | (16) | ​
Stock compensation expense | ​ |  | 506 | ​ |  | 743 | ​ |  | 980 | ​
(Decrease) increase in other liabilities | ​ |  | (8,084) | ​ |  | 2,467 | ​ |  | (58) | ​
Equity in undistributed net income of subsidiaries | ​ |  | (168,603) | ​ |  | (41,641) | ​ |  | (84,234) | ​
Net cash provided by operating activities | ​ |  | 77,690 | ​ |  | 128,937 | ​ |  | 121,776 | ​
Investing activities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net decrease (increase) in notes receivable | ​ |  | 1,549 | ​ |  | — | ​ |  | (12,100) | ​
(Decrease) increase in other assets and other investments | ​ |  | (11,787) | ​ |  | 31,289 | ​ |  | 5,915 | ​
Net cash (used in) provided by investing activities | ​ |  | (10,238) | ​ |  | 31,289 | ​ |  | (6,185) | ​
Financing activities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Redemption of long-term debt | ​ |  | — | ​ |  | — | ​ |  | (25,774) | ​
Proceeds from stock transactions | ​ |  | 2,414 | ​ |  | 542 | ​ |  | 1,923 | ​
Payments of cash dividends - common | ​ |  | (72,838) | ​ |  | (69,928) | ​ |  | (68,670) | ​
Purchase of treasury stock | ​ |  | (716) | ​ |  | (48,878) | ​ |  | (17,845) | ​
Net cash used in financing activities | ​ |  | (71,140) | ​ |  | (118,264) | ​ |  | (110,366) | ​
(Decrease) increase in cash | ​ |  | (3,688) | ​ |  | 41,962 | ​ |  | 5,225 | ​
Cash at beginning of year | ​ |  | 66,252 | ​ |  | 24,290 | ​ |  | 19,065 | ​
Cash at end of year | ​ | $ | 62,564 | ​ | $ | 66,252 | ​ | $ | 24,290 | ​
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- Definition This element can be used to encapsulate the condensed financial information of Balance sheet disclosure of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document. + References No definition available. + Details
Name: | iboc_CondensedFinancialInformationOfCashFlowParentCompanyOnlyDisclosureTextBlock
Namespace Prefix: | iboc_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration