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v2.4.1.9

Deposits (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Demand non-interest bearing |  |  |
Domestic | $ 2,382,935 us-gaap_NoninterestBearingDepositLiabilitiesDomestic | $ 2,175,694 us-gaap_NoninterestBearingDepositLiabilitiesDomestic |
Foreign | 547,318 us-gaap_NoninterestBearingDepositLiabilitiesForeign | 490,816 us-gaap_NoninterestBearingDepositLiabilitiesForeign |
Total demand non-interest bearing | 2,930,253 us-gaap_NoninterestBearingDepositLiabilities | 2,666,510 us-gaap_NoninterestBearingDepositLiabilities |
Savings and interest bearing demand |  |  |
Domestic | 2,488,458 us-gaap_InterestBearingDepositLiabilitiesDomestic | 2,364,905 us-gaap_InterestBearingDepositLiabilitiesDomestic |
Foreign | 537,222 us-gaap_InterestBearingDepositLiabilitiesForeign | 560,707 us-gaap_InterestBearingDepositLiabilitiesForeign |
Total savings and interest bearing demand | 3,025,680 us-gaap_InterestBearingDepositLiabilities | 2,925,612 us-gaap_InterestBearingDepositLiabilities |
$100,000 or more |  |  |
Domestic | 835,792 us-gaap_TimeDeposits100000OrMoreDomestic | 856,700 us-gaap_TimeDeposits100000OrMoreDomestic |
Foreign | 864,346 us-gaap_TimeDeposits100000OrMoreForeign | 938,940 us-gaap_TimeDeposits100000OrMoreForeign |
Less than $100,000 |  |  |
Domestic | 482,089 iboc_TimeDepositsLessThan100000Domestic | 531,503 iboc_TimeDepositsLessThan100000Domestic |
Foreign | 300,465 iboc_TimeDepositsLessThan100000Foreign | 324,160 iboc_TimeDepositsLessThan100000Foreign |
Total time, certificates of deposit | 2,482,692 us-gaap_TimeDeposits | 2,651,303 us-gaap_TimeDeposits |
Total deposits | 8,438,625 us-gaap_Deposits | 8,243,425 us-gaap_Deposits |
Savings and interest bearing demand |  |  |
Domestic | 2,998 iboc_InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDepositDomestic | 3,182 iboc_InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDepositDomestic | 4,487 iboc_InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDepositDomestic
Foreign | 599 iboc_InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDepositForeign | 580 iboc_InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDepositForeign | 801 iboc_InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDepositForeign
Total savings and interest bearing demand | 3,597 us-gaap_InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDeposits | 3,762 us-gaap_InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDeposits | 5,288 us-gaap_InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDeposits
$100,000 or more |  |  |
Domestic | 4,615 iboc_InterestExpenseTimeDeposits100000OrMoreDomestic | 5,761 iboc_InterestExpenseTimeDeposits100000OrMoreDomestic | 8,263 iboc_InterestExpenseTimeDeposits100000OrMoreDomestic
Foreign | 4,529 iboc_InterestExpenseTimeDeposits100000OrMoreForeign | 5,590 iboc_InterestExpenseTimeDeposits100000OrMoreForeign | 9,148 iboc_InterestExpenseTimeDeposits100000OrMoreForeign
Less than $100,000 |  |  |
Domestic | 2,074 iboc_InterestExpenseTimeDepositsLessThan100000Domestic | 3,065 iboc_InterestExpenseTimeDepositsLessThan100000Domestic | 4,945 iboc_InterestExpenseTimeDepositsLessThan100000Domestic
Foreign | 815 iboc_InterestExpenseTimeDepositsLessThan100000Foreign | 1,028 iboc_InterestExpenseTimeDepositsLessThan100000Foreign | 1,617 iboc_InterestExpenseTimeDepositsLessThan100000Foreign
Total time, certificates of deposit | 12,033 us-gaap_InterestExpenseTimeDeposits | 15,444 us-gaap_InterestExpenseTimeDeposits | 23,973 us-gaap_InterestExpenseTimeDeposits
Total interest expense on deposits | $ 15,630 us-gaap_InterestExpenseDeposits | $ 19,206 us-gaap_InterestExpenseDeposits | $ 29,261 us-gaap_InterestExpenseDeposits

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- Definition The aggregate interest expense incurred on the following domestic deposits in domestic offices: (1) transaction accounts (NOW, and telephone and preauthorized transfer accounts), (2) money market deposits and (3) savings deposit. + References No definition available. + Details
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- Definition The aggregate interest expense incurred on the following foreign deposits in domestic offices: (1) transaction accounts (NOW, and telephone and preauthorized transfer accounts), (2) money market deposits and (3) savings deposit. + References No definition available. + Details
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- Definition The aggregate amount of domestic time deposits (including certificates of deposits, individual retirement accounts and open accounts) that total to less than 100,000 dollars. + References No definition available. + Details
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- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + Details
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- Definition The aggregate of all domestic and foreign interest-bearing deposit liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + Details
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- Definition Total amount of interest-bearing domestic deposit liabilities, which may include brokered, retail, demand, checking, notice of withdrawal, money market and other interest-bearing deposits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + Details
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- Definition Amount of foreign interest-bearing deposits held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(a)) -URI http://asc.fasb.org/extlink&oid=6882215&loc=d3e537907-122884 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 05 -Paragraph a -Article 9 + Details
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- Definition Aggregate amount of interest expense on all deposits. + 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 210.9-04.6) -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 6 -Article 9 + Details
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- Definition The aggregate interest expense incurred on the following for deposits in domestic offices: (1) transaction accounts (NOW, and telephone and preauthorized transfer accounts), (2) money market deposits and (3) savings deposits. + 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 210.9-04.6) -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 6 -Article 9 + Details
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- Definition The aggregate interest expense incurred on time deposits, including certificates of deposits, in domestic offices. + 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 210.9-04.6) -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 6 -Article 9 + Details
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- Definition The aggregate amount of all domestic and foreign noninterest-bearing deposits liabilities held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + Details
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- Definition Amount of domestic noninterest-bearing deposits held by the entity, which may include demand deposits, checking, brokered and retail deposits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + Details
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- Definition Amount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + Details
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