XML 61 R40.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

Deposits (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of deposits and related interest expense

​

​	​	​	​	​	​	​	​
​	​	2019		​	2018
​	​	(Dollars in Thousands)
Deposits:		​			​		​
Demand - non-interest bearing	​	​	​	​	​	​	​
Domestic	​	$	2,815,835	​	$	2,758,768	​
Foreign	​		730,070	​		696,072	​
Total demand non-interest bearing	​		3,545,905	​		3,454,840	​
Savings and interest bearing demand	​	​	​	​	​	​	​
Domestic	​		2,477,668	​		2,531,854	​
Foreign	​		790,161	​		736,383	​
Total savings and interest bearing demand	​		3,267,829	​		3,268,237	​
Time, certificates of deposit $100,000 or more	​	​	​	​	​	​	​
Domestic	​		636,005	​		590,895	​
Foreign	​		827,031	​		807,486	​
Less than $100,000	​	​	​	​	​	​	​
Domestic	​		302,620	​		323,377	​
Foreign	​		246,644	​		251,710	​
Total time, certificates of deposit	​		2,012,300	​		1,973,468	​
Total deposits	​	$	8,826,034	​	$	8,696,545	​

​

​

​	​	​	​	​	​	​	​	​	​	​
​	​	2019		​	2018		​	2017
​	​	(Dollars in Thousands)
Interest expense:		​			​			​		​
Savings and interest bearing demand	​	​	​	​	​	​	​	​	​	​
Domestic		$	13,462	​	$	11,029	​	$	5,453	​
Foreign		​	2,917	​		1,735	​		755	​
Total savings and interest bearing demand		​	16,379	​		12,764	​		6,208	​
Time, certificates of deposit $100,000 or more	​	​	​	​	​	​	​	​	​	​
Domestic		​	7,804	​		4,741	​		3,644	​
Foreign		​	9,407	​		5,798	​		4,105	​
Less than $100,000	​	​	​	​	​	​	​	​	​	​
Domestic		​	2,232	​		1,589	​		1,312	​
Foreign		​	1,527	​		968	​		675	​
Total time, certificates of deposit		​	20,970	​		13,096	​		9,736	​
Total interest expense on deposits	​	$	37,349	​	$	25,860	​	$	15,944	​

​

Scheduled maturities of time deposits

Scheduled maturities of time deposits as of December 31, 2019 were as follows:

​

​	​	​	​	​
​		Total
​	​	(in thousands)
2020	​	$	1,848,026	​
2021	​		111,775	​
2022	​		38,415	​
2023	​		13,112	​
2024	​		944	​
Thereafter	​		28	​
Total	​	$	2,012,300	​

Scheduled maturities of time deposits in amounts of $100,000 or more

​

​	​	​	​
​	​	Total
​	​	(in thousands)
Due within 3 months or less		$	536,400
Due after 3 months and within 6 months	​		351,059
Due after 6 months and within 12 months	​		465,735
Due after 12 months	​		109,842
​	​	$	1,463,036

X

- Definition

Tabular disclosure of information pertaining to deposits and related interest expense.

+ References

No definition available.

+ Details

Name:	iboc_ScheduleOfDepositsAndRelatedInterestExpenseTableTextBlock
Namespace Prefix:	iboc_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of time deposits, classified with respect to their maturities.

+ References

No definition available.

+ Details

Name:	iboc_ScheduleOfTimeDepositsContractualMaturitiesTableTextBlock
Namespace Prefix:	iboc_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of time deposits with balances of 100,000 dollars or more, along with contractual maturities.

+ References

No definition available.

+ Details

Name:	iboc_ScheduleOfTimeDepositsWithBalancesOf100000OrMoreWithContractualMaturitiesTableTextBlock
Namespace Prefix:	iboc_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration