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v2.4.0.6

Fair Value Measurement (Narrative) (Details) (USD $) | 6 Months Ended | 12 Months Ended | 18 Months Ended
--- | --- | --- | ---
Jun. 30, 2012 | Dec. 31, 2011 | Jun. 30, 2012 Minimum [Member] | Jun. 30, 2012 Maximum [Member]
Auction rate security bond par value | $ 4,000,000 | $ 5,000,000 |  |
Percentage of auction rate security guaranteed | 75.20% | 79.60% |  |
Percentage of carrying value of auction rate securities |  |  | 3.00% | 4.00%

X
- Definition Auction rate security bond par value + References No definition available. + Details
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Namespace Prefix: | itic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Percentage of auction rate security guaranteed + References No definition available. + Details
Name: | itic_PercentageOfAuctionRateSecurityGuaranteed
Namespace Prefix: | itic_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of carrying value of auction rate securities + References No definition available. + Details
Name: | itic_PercentageOfCarryingValueOfAuctionRateSecurities
Namespace Prefix: | itic_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration