XML 58 R48.htm IDEA: XBRL DOCUMENT
v3.20.2

Acquisitions and FDIC Indemnification Asset (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Gross, Carrying Amount, Covered |  |  |  |  | $ 6,347 | $ 7,269 | $ 1,494 | $ 1,530
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion |  | $ 0 | $ 0 |  |  |  |  |
Loans and Leases Receivable, Disposals | $ (1,511) | (36) | (2,433) | $ (72) |  |  |  |
Total Covered Assets | 4,836 | 1,458 | 4,836 | 1,458 |  |  |  |
Consumer Loan [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Gross, Carrying Amount, Covered |  |  |  |  | 0 | 0 | 0 | 0
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion |  | 0 | 0 |  |  |  |  |
Loans and Leases Receivable, Disposals | 0 | 0 | 0 | 0 |  |  |  |
Total Covered Assets | 0 | 0 | 0 | 0 |  |  |  |
Commercial Loan [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Gross, Carrying Amount, Covered |  |  |  |  | $ 6,347 | $ 7,269 | $ 1,494 | $ 1,530
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion |  | 0 | 0 |  |  |  |  |
Loans and Leases Receivable, Disposals | (1,511) | (36) | (2,433) | (72) |  |  |  |
Total Covered Assets | $ 4,836 | $ 1,458 | $ 4,836 | $ 1,458 |  |  |  |

X
- Definition Represents the carrying amount of all categories of financing receivables held in portfolio and assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings or defeasance, whose losses will be shared with the Federal Deposit Insurance Corporation under the loss-sharing agreement. + References No definition available. + Details
Name: | thff_CoveredAssets
Namespace Prefix: | thff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans and Leases Disposals + References No definition available. + Details
Name: | thff_LoansandLeasesDisposals
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_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accretion recognized for the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities, with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121585399&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate gross carrying amount of loans and leases receivable covered by loss sharing agreements. + References No definition available. + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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