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International Bancshares Corporation (Parent Company Only) Financial Information Statements of Condition (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | --- | --- | ---
ASSETS |  |  |  |
Other investments | $ 388,563 | $ 372,739 |  |
Other assets | 158,862 | 179,936 |  |
Total assets | 12,079,477 | 11,882,673 |  |
Liabilities: |  |  |  |
Junior subordinated deferrable interest debentures | 190,726 | 190,726 |  |
Other liabilities | 39,587 | 90,320 |  |
Total liabilities | 10,655,069 | 10,446,965 |  |
Shareholders' equity: |  |  |  |
Common shares | 95,744 | 95,725 |  |
Surplus | 163,947 | 163,287 |  |
Retained earnings | 1,467,000 | 1,369,543 |  |
Accumulated other comprehensive (loss) income | (43,774) | 65,662 |  |
Total shareholders' equity before treasury stock | 1,682,917 | 1,694,217 |  |
Less cost of shares in treasury | (258,509) | (258,509) |  |
Total shareholders' equity | 1,424,408 | 1,435,708 | 1,600,165 | 1,459,217
Total liabilities and shareholders' equity | 12,079,477 | 11,882,673 |  |
Parent Company |  |  |  |
ASSETS |  |  |  |
Cash | 8,106 | 1,539 |  |
Other investments | 62,381 | 63,044 |  |
Notes receivable | 313 | 409 |  |
Investment in subsidiaries | 1,556,932 | 1,573,679 |  |
Other assets | 197 | 617 |  |
Total assets | 1,627,929 | 1,639,288 |  |
Liabilities: |  |  |  |
Junior subordinated deferrable interest debentures | 190,726 | 190,726 |  |
Due to IBC Trading | 21 | 21 |  |
Other liabilities | 12,774 | 12,833 |  |
Total liabilities | 203,521 | 203,580 |  |
Shareholders' equity: |  |  |  |
Common shares | 95,744 | 95,725 |  |
Surplus | 163,947 | 163,287 |  |
Retained earnings | 1,467,000 | 1,369,543 |  |
Accumulated other comprehensive (loss) income | (43,774) | 65,662 |  |
Total shareholders' equity before treasury stock | 1,682,917 | 1,694,217 |  |
Less cost of shares in treasury | (258,509) | (258,509) |  |
Total shareholders' equity | 1,424,408 | 1,435,708 |  |
Total liabilities and shareholders' equity | $ 1,627,929 | $ 1,639,288 |  |

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