XML 59 R49.htm IDEA: XBRL DOCUMENT v3.19.1

Acquisitions and FDIC Indemnification Asset (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Assets	$ 3,025,565,000	$ 3,008,718,000
Goodwill	34,355,000	34,355,000
Loans and Leases Receivable, Net of Loans with Deteriorated Credit Quality, Covered	3,000,000	$ 3,200,000
First National Bank Of Danville [Member]
Business Acquisition [Line Items]
Reimbursements from the FDIC	19,400,000
Business Aquisition, Loss Sharing Agreement Losses On Assets Threshold	$ 29,000,000
Business Acquisition Loss Sharing Agreement Losses In Excess Of Threshold To Be Reimbursed Percentage	95.00%
Business Acquisition, Loss Sharing Agreement Losses Up To Threshold To Be Reimbursed Percentage	80.00%

X

- Definition

Represents the percentage of losses on assets acquired under business combination and covered under loss-sharing agreement, to be reimbursed by FDIC, if losses exceed the threshold amount.

+ References

No definition available.

+ Details

Name:	thff_BusinessAcquisitionLossSharingAgreementLossesInExcessOfThresholdToBeReimbursedPercentage
Namespace Prefix:	thff_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the percentage of losses on assets acquired under business combination and covered under loss-sharing agreement, to be reimbursed by FDIC, if losses are up to the threshold amount.

+ References

No definition available.

+ Details

Name:	thff_BusinessAcquisitionLossSharingAgreementLossesUpToThresholdToBeReimbursedPercentage
Namespace Prefix:	thff_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the threshold amount of losses on assets acquired in a business combination to calculate the amount of reimbursement under the loss-sharing agreement.

+ References

No definition available.

+ Details

Name:	thff_BusinessAquisitionLossSharingAgreementLossesOnAssetsThreshold
Namespace Prefix:	thff_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Loans and Leases Receivable, Net of Loans with Deteriorated Credit Quality, Covered

+ References

No definition available.

+ Details

Name:	thff_LoansandLeasesReceivableNetofLoanswithDeterioratedCreditQualityCovered
Namespace Prefix:	thff_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_Assets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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 decreases to the indemnification asset due to cash payments received relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC).

+ References

No definition available.

+ Details

Name:	us-gaap_FDICIndemnificationAssetCashPaymentsReceived
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

+ Details

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=thff_FirstNationalBankOfDanvilleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: