XML 56 R46.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Commitments And Contingencies (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Loss Contingencies [Line Items] |  |  |
Like-kind exchange deposits and reverse exchange property | $ 159,781,000 | $ 171,010,000 |
Independence Title [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Net Premiums Written Percentage | 6.00% | 10.30% | 23.60%

X
- Definition Like-kind exchange deposits and reverse exchange property + References No definition available. + Details
Name: | itic_LikeKindExchangeDepositsAndReverseExchangeProperty
Namespace Prefix: | itic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The percentage of total net premiums written originated + References No definition available. + Details
Name: | itic_NetPremiumsWrittenPercentage
Namespace Prefix: | itic_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=itic_IndependenceTitleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |