XML 35 R25.htm IDEA: XBRL DOCUMENT
v3.21.2

Allowance for Loan Losses (Details 4) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Beginning Balance | $ 4,464 | $ 4,156 | $ 4,206 | $ 4,194
Added | 187 | 104 | 613 | 258
Charged Off | (59) | (15) | (102) | (56)
Payments | (132) | (346) | (257) | (497)
Ending Balance | 4,460 | 3,899 | 4,460 | 3,899
Commercial Portfolio Segment [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Beginning Balance | 0 | 4 | 0 | 11
Added | 0 | 0 | 0 | 0
Charged Off | 0 | 0 | 0 | 0
Payments | 0 | (4) | 0 | (11)
Ending Balance | 0 | 0 | 0 | 0
Residential Portfolio Segment [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Beginning Balance | 3,888 | 3,438 | 3,589 | 3,485
Added | 113 | 63 | 491 | 123
Charged Off | (27) | 0 | (27) | (6)
Payments | (70) | (270) | (149) | (371)
Ending Balance | 3,904 | 3,231 | 3,904 | 3,231
Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Beginning Balance | 576 | 714 | 617 | 698
Added | 74 | 41 | 122 | 135
Charged Off | (32) | (15) | (75) | (50)
Payments | (62) | (72) | (108) | (115)
Ending Balance | $ 556 | $ 668 | $ 556 | $ 668

X
- Definition Financing Receivable, Impaired, Troubled Debt Restructuring, Additions During Period + References No definition available. + Details
Name: | thff_FinancingReceivableImpairedTroubledDebtRestructuringAdditionsDuringPeriod
Namespace Prefix: | thff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Financing Receivable, Impaired, Troubled Debt Restructuring, Payments During Period + References No definition available. + Details
Name: | thff_FinancingReceivableImpairedTroubledDebtRestructuringPaymentsDuringPeriod
Namespace Prefix: | thff_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
Name: | us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
Name: | us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |