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v2.4.1.9

Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Interest income: |  |  |
Loans, including fees | $ 281,546 us-gaap_InterestAndFeeIncomeLoansAndLeases | $ 263,027 us-gaap_InterestAndFeeIncomeLoansAndLeases | $ 268,588 us-gaap_InterestAndFeeIncomeLoansAndLeases
Investment securities: |  |  |
Taxable | 100,095 us-gaap_InterestIncomeSecuritiesTaxable | 87,198 us-gaap_InterestIncomeSecuritiesTaxable | 94,885 us-gaap_InterestIncomeSecuritiesTaxable
Tax-exempt | 11,767 us-gaap_InterestIncomeSecuritiesTaxExempt | 12,877 us-gaap_InterestIncomeSecuritiesTaxExempt | 11,663 us-gaap_InterestIncomeSecuritiesTaxExempt
Other interest income | 191 us-gaap_OtherInterestAndDividendIncome | 115 us-gaap_OtherInterestAndDividendIncome | 503 us-gaap_OtherInterestAndDividendIncome
Total interest income | 393,599 us-gaap_InterestAndDividendIncomeOperating | 363,217 us-gaap_InterestAndDividendIncomeOperating | 375,639 us-gaap_InterestAndDividendIncomeOperating
Interest expense: |  |  |
Savings and interest bearing demand deposits | 3,597 iboc_InterestExpenseSavingsAndDemandDepositAccounts | 3,762 iboc_InterestExpenseSavingsAndDemandDepositAccounts | 5,288 iboc_InterestExpenseSavingsAndDemandDepositAccounts
Time deposits | 12,033 us-gaap_InterestExpenseTimeDeposits | 15,444 us-gaap_InterestExpenseTimeDeposits | 23,973 us-gaap_InterestExpenseTimeDeposits
Securities sold under repurchase agreements | 24,616 us-gaap_InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase | 29,171 us-gaap_InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase | 37,645 us-gaap_InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase
Other borrowings | 2,033 iboc_InterestExpenseOtherBorrowings | 1,590 iboc_InterestExpenseOtherBorrowings | 998 iboc_InterestExpenseOtherBorrowings
Junior subordinated deferrable interest debentures | 4,264 us-gaap_InterestExpenseJuniorSubordinatedDebentures | 4,665 us-gaap_InterestExpenseJuniorSubordinatedDebentures | 6,595 us-gaap_InterestExpenseJuniorSubordinatedDebentures
Total interest expense | 46,543 us-gaap_InterestExpense | 54,632 us-gaap_InterestExpense | 74,499 us-gaap_InterestExpense
Net interest income | 347,056 us-gaap_InterestIncomeExpenseNet | 308,585 us-gaap_InterestIncomeExpenseNet | 301,140 us-gaap_InterestIncomeExpenseNet
Provision for probable loan losses | 14,423 us-gaap_ProvisionForLoanAndLeaseLosses | 22,968 us-gaap_ProvisionForLoanAndLeaseLosses | 27,959 us-gaap_ProvisionForLoanAndLeaseLosses
Net interest income after provision for probable loan losses | 332,633 us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss | 285,617 us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss | 273,181 us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
Non-interest income: |  |  |
Service charges on deposit accounts | 88,586 us-gaap_FeesAndCommissionsDepositorAccounts | 97,087 us-gaap_FeesAndCommissionsDepositorAccounts | 93,128 us-gaap_FeesAndCommissionsDepositorAccounts
Other service charges, commissions and fees |  |  |
Banking | 44,435 iboc_ServiceChargesFeesAndCommissionsOtherBanking | 41,075 iboc_ServiceChargesFeesAndCommissionsOtherBanking | 38,523 iboc_ServiceChargesFeesAndCommissionsOtherBanking
Non-banking | 7,463 us-gaap_FeesAndCommissionsOther | 7,116 us-gaap_FeesAndCommissionsOther | 6,998 us-gaap_FeesAndCommissionsOther
Investment securities transactions, net | 1,283 us-gaap_GainLossOnSaleOfSecuritiesNet | 9,601 us-gaap_GainLossOnSaleOfSecuritiesNet | 38,446 us-gaap_GainLossOnSaleOfSecuritiesNet
Other investments, net | 22,023 us-gaap_NoninterestIncomeOther | 22,383 us-gaap_NoninterestIncomeOther | 13,339 us-gaap_NoninterestIncomeOther
Other income | 14,558 us-gaap_NoninterestIncomeOtherOperatingIncome | 12,343 us-gaap_NoninterestIncomeOtherOperatingIncome | 10,157 us-gaap_NoninterestIncomeOtherOperatingIncome
Total non-interest income | 178,348 us-gaap_NoninterestIncome | 189,605 us-gaap_NoninterestIncome | 200,591 us-gaap_NoninterestIncome
Non-interest expense: |  |  |
Employee compensation and benefits | 121,511 us-gaap_LaborAndRelatedExpense | 119,845 us-gaap_LaborAndRelatedExpense | 118,041 us-gaap_LaborAndRelatedExpense
Occupancy | 32,530 us-gaap_OccupancyNet | 31,766 us-gaap_OccupancyNet | 34,608 us-gaap_OccupancyNet
Depreciation of bank premises and equipment | 24,013 us-gaap_DepreciationNonproduction | 26,017 us-gaap_DepreciationNonproduction | 26,756 us-gaap_DepreciationNonproduction
Professional fees | 10,925 us-gaap_ProfessionalFees | 13,146 us-gaap_ProfessionalFees | 14,369 us-gaap_ProfessionalFees
Deposit insurance assessments | 6,082 us-gaap_FederalDepositInsuranceCorporationPremiumExpense | 6,737 us-gaap_FederalDepositInsuranceCorporationPremiumExpense | 7,709 us-gaap_FederalDepositInsuranceCorporationPremiumExpense
Net expense, other real estate owned | 2,358 us-gaap_OtherRevenueExpenseFromRealEstateOperations | 6,896 us-gaap_OtherRevenueExpenseFromRealEstateOperations | 8,929 us-gaap_OtherRevenueExpenseFromRealEstateOperations
Amortization of identified intangible assets | 2,389 us-gaap_AmortizationOfIntangibleAssets | 4,633 us-gaap_AmortizationOfIntangibleAssets | 4,651 us-gaap_AmortizationOfIntangibleAssets
Advertising | 7,742 us-gaap_AdvertisingExpense | 7,034 us-gaap_AdvertisingExpense | 7,017 us-gaap_AdvertisingExpense
Early termination fee - securities sold under repurchase agreements | 11,000 iboc_PrepaymentPenaltyOnSecuritiesSoldUnderRepurchaseAgreement | 12,303 iboc_PrepaymentPenaltyOnSecuritiesSoldUnderRepurchaseAgreement | 31,550 iboc_PrepaymentPenaltyOnSecuritiesSoldUnderRepurchaseAgreement
Impairment charges (Total other-than-temporary impairment charges, $(366) less loss of $1,183, $(431) less loss of $1,805, and $(916) less gain of $(123), included in other comprehensive loss) | 817 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet | 1,374 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet | 1,039 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet
Other | 61,676 us-gaap_OtherNoninterestExpense | 62,881 us-gaap_OtherNoninterestExpense | 60,703 us-gaap_OtherNoninterestExpense
Total non-interest expense | 281,043 us-gaap_NoninterestExpense | 292,632 us-gaap_NoninterestExpense | 315,372 us-gaap_NoninterestExpense
Income before income taxes | 229,938 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 182,590 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 158,400 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Provision for income taxes | 76,787 us-gaap_IncomeTaxExpenseBenefit | 56,239 us-gaap_IncomeTaxExpenseBenefit | 50,565 us-gaap_IncomeTaxExpenseBenefit
Net income | 153,151 us-gaap_NetIncomeLoss | 126,351 us-gaap_NetIncomeLoss | 107,835 us-gaap_NetIncomeLoss
Preferred stock dividends and discount accretion |  |  | 14,362 us-gaap_PreferredStockDividendsIncomeStatementImpact
Net income available to common shareholders | $ 153,151 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 126,351 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 93,473 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Basic earnings per common share: |  |  |
Weighted average number of shares outstanding: (in shares) | 66,872,500 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 67,195,180 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 67,236,681 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Net income (in dollars per share) | $ 2.29 us-gaap_EarningsPerShareBasic | $ 1.88 us-gaap_EarningsPerShareBasic | $ 1.39 us-gaap_EarningsPerShareBasic
Fully diluted earnings per common share: |  |  |
Weighted average number of shares outstanding: (in shares) | 67,056,456 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 67,314,859 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 67,313,963 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Net income (in dollars per share) | $ 2.28 us-gaap_EarningsPerShareDiluted | $ 1.88 us-gaap_EarningsPerShareDiluted | $ 1.39 us-gaap_EarningsPerShareDiluted

X
- Definition Interest expense incurred during the reporting period on other borrowings not defined elsewhere in the taxonomy. Includes interest expense incurred on both the short-term and long-term borrowings (advances) with the Federal Home Loan Bank and other short term borrowings. + References No definition available. + Details
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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.23) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 + Details
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 + Details
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- Definition Amount of expense for Federal Deposit Insurance Corporation (FDIC) insurance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Includes amounts charged depositors for: (1) maintenance of their accounts (maintenance charges); (2) failure to maintain specified minimum balances on account; (3) exceeding the number of checks or transactions allowed to be processed in a given period; (4) checks drawn on no minimum balance deposit accounts; (5) withdrawals from nontransaction deposit accounts; (6) closing savings accounts before a specified minimum period of time has elapsed; (7) accounts which have remained inactive for extended periods of time or which have become dormant; (8) use of automated teller machines or remote service units; (9) checks drawn against insufficient funds that the bank assesses regardless of whether it decides to pay, return or hold the check; (10) issuing stop payment orders; (11) certifying checks; and (12) accumulating or disbursing funds deposited in IRAs or Keogh Plan accounts when not handled by the bank's trust department. This item does not include penalties assessed on the early withdrawal of time deposits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13 (d)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Fee and commission revenue earned from sources not otherwise specified in the existing taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Article 9 + Details
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- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1-5) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1, 2 , 3, 4, 5 -Article 9 + Details
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- Definition The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1 -Article 9 + Details
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