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International Bancshares Corporation (Parent Company Only) Financial Information Statements of Cash Flows (Details) (USD $) | 12 Months Ended | 48 Months Ended
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Nov. 28, 2012
Operating activities: |  |  |  |
Net income | $ 126,351,000 | $ 107,835,000 | $ 127,149,000 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |
Accretion of junior subordinated interest deferrable debentures |  |  | 9,000 |
Investment securities transactions, net | (9,601,000) | (38,446,000) | (17,285,000) |
Impairment charges on available for sale securities | 1,374,000 | 1,039,000 | 977,000 |
Stock compensation expense | 414,000 | 474,000 | 387,000 |
(Decrease) increase in other liabilities | (2,272,000) | 7,106,000 | (4,966,000) |
Net cash provided by operating activities | 209,126,000 | 160,013,000 | 180,823,000 |
Investing activities: |  |  |  |
Principal collected on mortgage-backed securities | 1,223,532,000 | 1,294,197,000 | 999,419,000 |
Net cash (used in) provided by investing activities | (447,649,000) | (261,016,000) | 207,133,000 |
Financing activities: |  |  |  |
Redemption of preferred shares |  | (216,000,000) |  |
Proceeds from stock transactions | 265,000 | 51,000 | 113,000 |
Payments of cash dividends - common | (28,894,000) | (26,894,000) | (25,648,000) |
Payments of cash dividends - preferred |  | (10,260,000) | (10,800,000) | (41,520,139)
Purchase of treasury stock |  | (1,716,000) | (6,435,000) |
Net cash provided by (used in) financing activities | 230,208,000 | 122,218,000 | (323,885,000) |
(Decrease) increase in cash and cash equivalents | (8,315,000) | 21,215,000 | 64,071,000 |
Cash and cash equivalents at beginning of year | 283,100,000 | 261,885,000 | 197,814,000 |
Cash and cash equivalents at end of year | 274,785,000 | 283,100,000 | 261,885,000 |
Parent Company |  |  |  |
Operating activities: |  |  |  |
Net income | 126,351,000 | 107,835,000 | 127,149,000 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |
Accretion of junior subordinated interest deferrable debentures |  |  | 9,000 |
Investment securities transactions, net |  |  | 2,000 |
Impairment charges on available for sale securities | 754,000 |  |  |
Stock compensation expense | 414,000 | 474,000 | 387,000 |
(Decrease) increase in other liabilities | (969,000) | 6,711,000 | (3,234,000) |
Equity in (undistributed) distributed net income of subsidiaries | (93,089,000) | 119,181,000 | (78,806,000) |
Net cash provided by operating activities | 33,461,000 | 234,201,000 | 45,507,000 |
Investing activities: |  |  |  |
Principal collected on mortgage-backed securities | 1,207,000 | 1,985,000 | 1,355,000 |
Net decrease (increase) in notes receivable | 96,000 | 86,000 | (245,000) |
Decrease (increase) in other assets and other investments | 432,000 | 6,418,000 | (4,193,000) |
Net cash (used in) provided by investing activities | 1,735,000 | 8,489,000 | (3,083,000) |
Financing activities: |  |  |  |
Repayment of trust preferred securities |  |  | (10,400,000) |
Redemption of preferred shares |  | (216,000,000) |  |
Proceeds from stock transactions | 265,000 | 51,000 | 113,000 |
Payments of cash dividends - common | (28,894,000) | (26,894,000) | (25,648,000) |
Payments of cash dividends - preferred |  | (10,260,000) | (10,800,000) |
Purchase of treasury stock |  | (1,716,000) | (6,435,000) |
Net cash provided by (used in) financing activities | (28,629,000) | (254,819,000) | (53,170,000) |
(Decrease) increase in cash and cash equivalents | 6,567,000 | (12,129,000) | (10,746,000) |
Cash and cash equivalents at beginning of year | 1,539,000 | 13,668,000 | 24,414,000 |
Cash and cash equivalents at end of year | $ 8,106,000 | $ 1,539,000 | $ 13,668,000 |

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