XML 34 R27.htm IDEA: XBRL DOCUMENT
v3.25.2

Investment Securities (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2025
Investments, Debt and Equity Securities [Abstract] |
Available for Sale and Held for Maturity Securities | The amortized cost, gross unrealized gains and losses and estimated fair values for available-for-sale and held-to-maturity securities by major security type at June 30, 2025 and December 31, 2024 were as follows (in thousands):
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Fair Value |
June 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities and obligations of U.S. government corporations and agencies |  | $ | 199,299 |  |  | $ | — |  |  | $ | (15,683 | ) |  | $ | 183,616 |
Obligations of states and political subdivisions |  |  | 325,609 |  |  |  | 202 |  |  |  | (64,487 | ) |  |  | 261,324 |
Mortgage-backed securities: GSE residential |  |  | 685,640 |  |  |  | 1,277 |  |  |  | (98,206 | ) |  |  | 588,711 |
Other securities |  |  | 45,155 |  |  |  | — |  |  |  | (1,965 | ) |  |  | 43,190 |
Total available-for-sale |  | $ | 1,255,703 |  |  | $ | 1,479 |  |  | $ | (180,341 | ) |  | $ | 1,076,841 |
Held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |
Other investments |  | $ | 2,287 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,287 |
Total held-to-maturity |  | $ | 2,287 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,287 |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities and obligations of U.S. government corporations and agencies |  | $ | 212,513 |  |  | $ | 3 |  |  | $ | (21,158 | ) |  | $ | 191,358 |
Obligations of states and political subdivisions |  |  | 324,046 |  |  |  | 135 |  |  |  | (56,441 | ) |  |  | 267,740 |
Mortgage-backed securities: GSE residential |  |  | 653,760 |  |  |  | 552 |  |  |  | (114,570 | ) |  |  | 539,742 |
Other securities |  |  | 67,117 |  |  |  | — |  |  |  | (2,665 | ) |  |  | 64,452 |
Total available-for-sale |  | $ | 1,257,436 |  |  | $ | 690 |  |  | $ | (194,834 | ) |  | $ | 1,063,292 |
Held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |
Other investments |  | $ | 2,279 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,279 |
Total held-to-maturity |  | $ | 2,279 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,279 |
Realized Gains and Losses From Sale of Securities | Realized gains and losses resulting from sales of securities were as follows during the three and six months ended June 30, 2025 and 2024 (in thousands):
|  | Three months ended |  |  | Six months ended |
|  | June 30, |  |  | June 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Gross gains |  | $ | — |  |  | $ | 35 |  |  | $ | — |  |  | $ | (35 | )
Gross losses |  |  | — |  |  |  | (191 | ) |  |  | (181 | ) |  |  | (191 | )
Investments Classified by Contractual Maturity Date | The following table indicates the expected maturities of investment securities classified as available-for-sale presented at fair value, and held-to-maturity presented at amortized cost, at June 30, 2025 and the weighted average yield for each range of maturities (dollars in thousands):
|  | One year or less |  |  | After 1 through 5 years |  |  | After 5 through 10 years |  |  | After ten years |  |  | Total |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities and obligations of U.S. government corporations and agencies |  | $ | 173,774 |  |  | $ | 9,842 |  |  | $ | — |  |  | $ | — |  |  | $ | 183,616 |
Obligations of state and political subdivisions |  |  | 35,798 |  |  |  | 134,711 |  |  |  | 88,303 |  |  |  | 2,512 |  |  |  | 261,324 |
Mortgage-backed securities: GSE residential |  |  | 28 |  |  |  | 7,914 |  |  |  | 34,567 |  |  |  | 546,202 |  |  |  | 588,711 |
Other securities |  |  | 35,238 |  |  |  | 7,118 |  |  |  | 834 |  |  |  | — |  |  |  | 43,190 |
Total available-for-sale investments |  | $ | 244,838 |  |  | $ | 159,585 |  |  | $ | 123,704 |  |  | $ | 548,714 |  |  | $ | 1,076,841 |
Weighted average yield |  |  | 2.02 | % |  |  | 2.25 | % |  |  | 2.28 | % |  |  | 2.13 | % |  |  | 2.14 | %
Full tax-equivalent yield |  |  | 2.14 | % |  |  | 2.77 | % |  |  | 2.69 | % |  |  | 2.14 | % |  |  | 2.31 | %
Held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other investments |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 2,287 |  |  | $ | 2,287 |
Total held-to-maturity |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 2,287 |  |  | $ | 2,287 |
Weighted average yield |  |  | — | % |  |  | — | % |  |  | — | % |  |  | — | % |  |  | — | %
Full tax-equivalent yield |  |  | — | % |  |  | — | % |  |  | — | % |  |  | — | % |  |  | — | %
Fair Value of Investments with Sustained Gross Unrealized Losses | The following table presents the aging of gross unrealized losses and fair value by investment category as of June 30, 2025 and December 31, 2024 (in thousands):
|  | Less than 12 months |  |  | 12 months or more |  |  | Total |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
June 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities and obligations of U.S. government corporations and agencies |  | $ | 1,583 |  |  | $ | (2 | ) |  | $ | 182,033 |  |  | $ | (15,681 | ) |  | $ | 183,616 |  |  | $ | (15,683 | )
Obligations of states and political subdivisions |  |  | 8,584 |  |  |  | (323 | ) |  |  | 242,507 |  |  |  | (64,164 | ) |  |  | 251,091 |  |  |  | (64,487 | )
Mortgage-backed securities: GSE residential |  |  | 12,212 |  |  |  | (155 | ) |  |  | 495,160 |  |  |  | (98,051 | ) |  |  | 507,372 |  |  |  | (98,206 | )
Other securities |  |  | — |  |  |  | — |  |  |  | 40,439 |  |  |  | (1,965 | ) |  |  | 40,439 |  |  |  | (1,965 | )
Total |  | $ | 22,379 |  |  | $ | (480 | ) |  | $ | 960,139 |  |  | $ | (179,861 | ) |  | $ | 982,518 |  |  | $ | (180,341 | )
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities and obligations of U.S. government corporations and agencies |  | $ | 1,340 |  |  | $ | — |  |  | $ | 189,327 |  |  | $ | (21,158 | ) |  | $ | 190,667 |  |  | $ | (21,158 | )
Obligations of states and political subdivisions |  |  | 20,349 |  |  |  | (1,248 | ) |  |  | 241,502 |  |  |  | (55,193 | ) |  |  | 261,851 |  |  |  | (56,441 | )
Mortgage-backed securities: GSE residential |  |  | 1,135 |  |  |  | (18 | ) |  |  | 511,746 |  |  |  | (114,552 | ) |  |  | 512,881 |  |  |  | (114,570 | )
Other securities |  |  | — |  |  |  | — |  |  |  | 58,702 |  |  |  | (2,665 | ) |  |  | 58,702 |  |  |  | (2,665 | )
Total |  | $ | 22,824 |  |  | $ | (1,266 | ) |  | $ | 1,001,277 |  |  | $ | (193,568 | ) |  | $ | 1,024,101 |  |  | $ | (194,834 | )
At June 30, 2025, there were five hundred forty-three available-for-sale securities with a fair value of $960.1 million and unrealized losses of $179.9 million in a continuous unrealized loss position for twelve months or more. At December 31, 2024, there were five hundred fifty-seven available-for-sale securities with a fair value of $1.0 billion and unrealized losses of $193.6 million in a continuous unrealized loss position for twelve months or more. At June 30, 2025 and December 31, 2024, there were no held-to-maturity securities in a continuous unrealized loss position for twelve months or more.

X
- Definition Tabular disclosure of available-for-sale and held-for-maturity securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures. + References No definition available. + Details
Name: | fmbh_AvailableForSaleAndHeldForMaturitySecuritiesTableTextBlock
Namespace Prefix: | fmbh_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-6 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of realized gains and losses on investments reported in the statement of income. + References No definition available. + Details
Name: | us-gaap_RealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration