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v2.4.1.9

Securities (Details Textual) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Gain on sale of investments | $ 4 us-gaap_GainLossOnSaleOfSecuritiesNet | $ 0 us-gaap_GainLossOnSaleOfSecuritiesNet |  |
Gross unrealized losses | 3,688 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax |  | 8,189 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax |
Cumulative OTTI charges | 13,995 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld | 14,079 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld | 14,050 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld | 14,079 us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld
Amortized Cost | 882,463 us-gaap_AvailableForSaleSecuritiesAmortizedCost |  | 880,946 us-gaap_AvailableForSaleSecuritiesAmortizedCost |
Securities available-for-sale | $ 906,341 us-gaap_AvailableForSaleSecurities |  | $ 897,053 us-gaap_AvailableForSaleSecurities |
Minimum [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Basis point spread on variable rate | 1.60%thff_AvailableforSaleSecuritiesBasisPointSpreadonVariableRate / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |
Minimum [Member] | Standard Poors [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Credit Quality Indicator Pricing | 4.4 thff_CreditQualityIndicatorPricing / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = thff_StandardPoorsMember |  |  |
Minimum [Member] | Moody Investor Service [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Credit Quality Indicator Pricing | 0.32 thff_CreditQualityIndicatorPricing / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = thff_MoodyInvestorServiceMember |  |  |
Maximum [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Basis point spread on variable rate | 1.80%thff_AvailableforSaleSecuritiesBasisPointSpreadonVariableRate / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |
Maximum [Member] | Standard Poors [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Credit Quality Indicator Pricing | 90.3 thff_CreditQualityIndicatorPricing / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = thff_StandardPoorsMember |  |  |
Maximum [Member] | Moody Investor Service [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Credit Quality Indicator Pricing | 90.5 thff_CreditQualityIndicatorPricing / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = thff_MoodyInvestorServiceMember |  |  |

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- Definition Available for Sale Securities, Basis Point Spread on Variable Rate + References No definition available. + Details
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The net gain (loss) realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Subparagraph h -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 3 -Article 7 + Details
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- Definition The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563 + Details
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