XML 61 R46.htm IDEA: XBRL DOCUMENT v3.8.0.1

International Operations (Tables)

12 Months Ended

Dec. 31, 2017

International Operations

Summary of assets attributable to international operations

		2017			2016
		(Dollars in Thousands)
Loans:
Commercial		$	113,019		$	124,079
Others			45,867			43,141
			158,886			167,220
Less allowance for probable loan losses			(842)			(884)
Net loans		$	158,044		$	166,336
Accrued interest receivable		$	671		$	603

X

- References

No definition available.

+ Details

Name:	iboc_InternationalOperationsDisclosureAbstract
Namespace Prefix:	iboc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

+ References

No definition available.

+ Details

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