Consolidated Statements Of Cash Flows (Parenthetical) - USD ($)	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Statement of Cash Flows [Abstract]
Non cash net unrealized gain on investments, deferred tax provision	$ (537,391)	$ (369,394)

The amount of deferred tax provision resulting from unrealized gains and losses during the period.

No definition available.

Name:	itic_DeferredTaxProvisionRelatedToUnrealizedGainLossOnInvestments
Namespace Prefix:	itic_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration