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v3.25.2

SUBSEQUENT EVENT (Details) - Senior Notes - USD ($) | Jul. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Nov. 01, 2013
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5.00% Senior Notes Due 2028 |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Interest rate on notes (as a percent) |  |  |  | 5.00%
First Merchants Senior Notes and Subordinated Notes |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Debt, weighted average interest rate |  | 6.87% | 7.18% |
Subsequent Event | 5.00% Senior Notes Due 2028 |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Redeemed | $ 5,000,000 |  |  |
Interest rate on notes (as a percent) | 5.00% |  |  |
Fixed interest rate term | 10 years |  |  |

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