XML 50 R37.htm IDEA: XBRL DOCUMENT
v3.22.0.1

OTHER BORROWINGS: (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Other Borrowings Disclosure [Abstract] |
Schedule of other borrowings |
(Dollar amounts in thousands) |  | 2021 |  | 2020
FHLB advances |  | $ | 15,937 |  |  | $ | 5,859 |
Junior subordinated debentures |  | — |  |  | — |
TOTAL |  | $ | 15,937 |  |  | $ | 5,859 |
Aggregate Minimum Annual Retirements |
2022 | $ | — |
2023 | 6,933 |
2024 | 2,658 |
2025 | 5,929 |
2026 | 417 |
Thereafter | — |
| $ | 15,937 |

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

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

X
- Definition Tabular disclosure of debt arrangements (having initial terms of repayment in excess of one year or the normal operating cycle, if longer). + References No definition available. + Details
Name: | thff_ScheduleOfOtherBorrowingsTableTextBlock
Namespace Prefix: | thff_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration