XML 71 R57.htm IDEA: XBRL DOCUMENT
v3.10.0.1

SECURITIES: (Details 3) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Less Than 12 Months |  |
Fair Value | $ 130,116 | $ 266,768
Unrealized Losses | (1,288) | (2,112)
More Than 12 Months |  |
Fair Value | 405,894 | 222,763
Unrealized Losses | (13,926) | (7,423)
Total |  |
Fair Value | 536,010 | 489,531
Unrealized Losses | (15,214) | (9,535)
U.S. Government entity mortgage-backed securities |  |
Less Than 12 Months |  |
Fair Value | 3,052 |
Unrealized Losses | (4) |
More Than 12 Months |  |
Fair Value | 11,356 |
Unrealized Losses | (467) |
Total |  |
Fair Value | 14,408 |
Unrealized Losses | (471) |
Mortgage-backed securities, residential |  |
Less Than 12 Months |  |
Fair Value | 39,997 | 9,321
Unrealized Losses | (553) | (86)
More Than 12 Months |  |
Fair Value | 111,423 | 3,538
Unrealized Losses | (3,477) | (232)
Total |  |
Fair Value | 151,420 | 12,859
Unrealized Losses | (4,030) | (318)
Mortgage-backed securities, commercial |  |
Less Than 12 Months |  |
Fair Value |  | 79,918
Unrealized Losses |  | (425)
More Than 12 Months |  |
Fair Value |  | 53,815
Unrealized Losses |  | (1,387)
Total |  |
Fair Value |  | 133,733
Unrealized Losses |  | (1,812)
Collateralized mortgage obligations |  |
Less Than 12 Months |  |
Fair Value | 52,838 | 150,182
Unrealized Losses | (455) | (1,418)
More Than 12 Months |  |
Fair Value | 241,373 | 146,750
Unrealized Losses | (8,969) | (5,287)
Total |  |
Fair Value | 294,211 | 296,932
Unrealized Losses | (9,424) | (6,705)
State and municipal obligations |  |
Less Than 12 Months |  |
Fair Value | 34,229 | 27,347
Unrealized Losses | (276) | (183)
More Than 12 Months |  |
Fair Value | 41,742 | 18,660
Unrealized Losses | (1,013) | (517)
Total |  |
Fair Value | 75,971 | 46,007
Unrealized Losses | $ (1,289) | (700)
Collateralized debt obligations |  |
Less Than 12 Months |  |
Fair Value |  | 0
Unrealized Losses |  | 0
More Than 12 Months |  |
Fair Value |  | 0
Unrealized Losses |  | 0
Total |  |
Fair Value |  | 0
Unrealized Losses |  | $ 0

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | thff_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAbstract
Namespace Prefix: | thff_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | thff_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAbstract
Namespace Prefix: | thff_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | thff_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTotalAbstract
Namespace Prefix: | thff_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CollateralizedDebtObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |