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Pay vs Performance Disclosure | 12 Months Ended
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Jun. 30, 2025 USD ($) $ / shares | Jun. 30, 2024 USD ($) $ / shares | Jun. 30, 2023 USD ($) $ / shares | Jun. 30, 2022 USD ($) $ / shares | Jun. 30, 2021 USD ($) $ / shares
Pay vs Performance Disclosure |  |  |  |  |
Pay vs Performance Disclosure, Table | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | Value of Initial Fixed $100 |  |  | ​ |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Investment Based on: | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | ​ | ​ |  | Average |  | ​ | ​ |  | ​ |  | ​ |  | ​ | ​ |  | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Summary | ​ | Average | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Diluted
​ | ​ | Summary | ​ | ​ | ​ | ​ | Compensation | ​ | Compensation | ​ | ​ | ​ | Peer Group | ​ | ​ | ​ | ​ | Earnings
​ | ​ | Compensation | ​ | Compensation | ​ | Table Total | ​ | Actually Paid | ​ | Total | ​ | Total | ​ | Net Income | ​ | Per
​ | ​ | Table Total for | ​ | Actually Paid | ​ | for Non-PEO | ​ | to Non-PEO | ​ | Shareholder | ​ | Shareholder | ​ | (in thousands) | ​ | Common
​ |  | PEO(1) |  | to PEO(2) |  | NEOs(3) |  | NEOs(4) |  | Return(5) |  | Return(6) |  | (7) |  | Share(8)
2025 | ​ | $ | 690,774 | ​ | $ | 791,200 | ​ | $ | 499,822 | ​ | $ | 599,941 |  | 246.84 |  | 186.37 | ​ | $ | 58,578 |  | 5.18
2024 | ​ | ​ | 653,666 | ​ | ​ | 784,965 | ​ | ​ | 445,241 | ​ | ​ | 434,562 | ​ | 199.53 | ​ | 152.45 | ​ | ​ | 50,182 | ​ | 4.42
2023 | ​ |  | 661,141 | ​ | ​ | 572,862 | ​ | ​ | 488,862 | ​ | ​ | 424,478 |  | 167.21 |  | 116.10 | ​ | ​ | 39,237 |  | 3.85
2022 | ​ |  | 651,898 | ​ |  | 648,187 | ​ | ​ | 388,627 | ​ |  | 386,517 |  | 193.14 |  | 143.56 | ​ |  | 47,169 |  | 5.21
2021 | ​ | ​ | 595,934 | ​ |  | 830,649 | ​ |  | 353,265 | ​ |  | 474,380 |  | 188.77 |  | 162.61 | ​ |  | 47,180 |  | 5.22
(1) | Represents the total compensation of our principal executive officer (“PEO”), Greg A. Steffens, as reported in the Summary Compensation Table (“SCT”) for each year indicated. Refer to the “Summary Compensation Table” above. Mr. Steffens served as our PEO during those years.
(2) | Represents the amount of “compensation actually paid” to Mr. Steffens, as computed in accordance with Item 402(v) of Regulation S-K. The amounts do not reflect the actual amount of compensation earned by or paid to Mr. Steffens during the applicable year. In accordance with the requirements of Item 402(v) of Regulation S-K, the following adjustments were made to Mr. Steffens’ total compensation for each year to determine the compensation actually paid:
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2025 |  | 2024 |  | 2023 |  | 2022 |  | 2021
Total compensation as reported in SCT | ​ | $ | 690,774 | ​ | $ | 653,666 | ​ | $ | 661,141 | ​ | $ | 651,898 | ​ | $ | 595,934
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value of equity awards granted during covered fiscal year | ​ |  | (78,353) | ​ |  | (70,590) | ​ |  | (77,555) | ​ |  | (84,006) | ​ |  | (87,872)
Fair value of equity awards granted in covered fiscal year and that were unvested at end of such covered fiscal year - valued at year-end | ​ |  | 72,514 | ​ |  | 81,533 | ​ |  | 56,588 | ​ |  | 68,008 | ​ |  | 138,552
Change in fair value from end of prior fiscal year to end of covered fiscal year for awards made in prior fiscal years that were unvested at end of current fiscal year | ​ |  | 79,650 | ​ |  | 94,606 | ​ |  | (44,694) | ​ |  | 8,761 | ​ |  | 133,187
Change in fair value from end of prior fiscal year to vesting date for awards made in prior fiscal years that vested during covered fiscal year | ​ |  | 26,615 | ​ |  | 25,750 | ​ |  | (22,618) | ​ |  | 3,526 | ​ |  | 50,818
Total compensation actually paid to PEO | ​ | $ | 791,200 | ​ | $ | 784,965 | ​ | $ | 572,862 | ​ | $ | 648,187 | ​ | $ | 830,649
(3) | Represents the average of the total compensation of each of our non-PEO NEOs as reported in the SCT for each year indicated. The non-PEO NEOs included in this calculation for 2025 are Messrs. Funke, Cox, Windes and Chkautovich, and for years 2024, 2023, 2022, and 2021 are Messrs. Funke, Cox, Hecker, and Windes.
(4) | Represents the average of the total compensation actually paid to our named non-PEO NEOs as reported in the SCT, as computed in accordance with Item 402(v) of Regulation S-K. The amounts do not reflect the actual amount of compensation earned by or paid to the non-PEO NEOs during the applicable year. In accordance with the requirements of Item 402(v) of Regulation S-K, the following adjustments were made to average total compensation for the non-PEO NEOs as a group for each year to determine the compensation actually paid:
​ Reconciliation of Non-PEO NEOs SCT Total and Compensation Actually Paid ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2025 |  | 2024 |  | 2023 |  | 2022 |  | 2021
Total compensation as reported in SCT | ​ | $ | 499,822 | ​ | $ | 445,241 | ​ | $ | 488,862 | ​ | $ | 388,627 | ​ | $ | 353,265
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value of equity awards granted during covered fiscal year | ​ |  | (87,400) | ​ |  | (113,666) | ​ |  | (111,725) | ​ |  | (46,098) | ​ |  | (48,516)
Fair value of equity awards granted in covered fiscal year and that were unvested at end of such covered fiscal year - valued at year-end | ​ |  | 79,835 | ​ |  | 86,734 | ​ |  | 84,409 | ​ |  | 37,184 | ​ |  | 77,736
Change in fair value from end of prior fiscal year to end of covered fiscal year for awards made in prior fiscal years that were unvested at end of current fiscal year | ​ |  | 89,436 | ​ |  | 10,932 | ​ |  | (24,802) | ​ |  | 4,922 | ​ |  | 67,595
Change in fair value from end of prior fiscal year to vesting date for awards made in prior fiscal years that vested during covered fiscal year | ​ |  | 18,248 | ​ |  | 5,320 | ​ |  | (12,266) | ​ |  | 1,882 | ​ |  | 24,300
Total average compensation actually paid to non-PEO NEOs | ​ | $ | 599,941 | ​ | $ | 434,562 | ​ | $ | 424,478 | ​ | $ | 386,517 | ​ | $ | 474,380
(5) | Represents the cumulative four-year total return to shareholders of our common stock and assumes that the value of the investment was $100 on June 30, 2020 and that the subsequent dividends were reinvested. The stock price performance included in this column is not necessarily indicative of future stock price performance.
(6) | Represents a cumulative four-year total return to shareholders of a peer group calculated using the same method described in footnote (5). For all years listed, the peer group used is the S&P U.S. BMI Banks Midwest Region Index.
(7) | Represents our reported net income reflected in the Company’s audited financial statements for each year indicated.
(8) | Represents our diluted earnings per common share, for each year indicated, which we believe represents the most important financial performance measure that was used to link compensation actually paid to our PEO and non-PEO NEOs for the most recent fiscal year to Company performance.
Company Selected Measure Name | diluted earnings per common share |  |  |  |
Named Executive Officers, Footnote |
(1) | Represents the total compensation of our principal executive officer (“PEO”), Greg A. Steffens, as reported in the Summary Compensation Table (“SCT”) for each year indicated. Refer to the “Summary Compensation Table” above. Mr. Steffens served as our PEO during those years.
(3) | Represents the average of the total compensation of each of our non-PEO NEOs as reported in the SCT for each year indicated. The non-PEO NEOs included in this calculation for 2025 are Messrs. Funke, Cox, Windes and Chkautovich, and for years 2024, 2023, 2022, and 2021 are Messrs. Funke, Cox, Hecker, and Windes.
Peer Group Issuers, Footnote |
(6) | Represents a cumulative four-year total return to shareholders of a peer group calculated using the same method described in footnote (5). For all years listed, the peer group used is the S&P U.S. BMI Banks Midwest Region Index.
PEO Total Compensation Amount | $ 690,774 | $ 653,666 | $ 661,141 | $ 651,898 | $ 595,934
PEO Actually Paid Compensation Amount | $ 791,200 | 784,965 | 572,862 | 648,187 | 830,649
Adjustment To PEO Compensation, Footnote |
(2) | Represents the amount of “compensation actually paid” to Mr. Steffens, as computed in accordance with Item 402(v) of Regulation S-K. The amounts do not reflect the actual amount of compensation earned by or paid to Mr. Steffens during the applicable year. In accordance with the requirements of Item 402(v) of Regulation S-K, the following adjustments were made to Mr. Steffens’ total compensation for each year to determine the compensation actually paid:
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2025 |  | 2024 |  | 2023 |  | 2022 |  | 2021
Total compensation as reported in SCT | ​ | $ | 690,774 | ​ | $ | 653,666 | ​ | $ | 661,141 | ​ | $ | 651,898 | ​ | $ | 595,934
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value of equity awards granted during covered fiscal year | ​ |  | (78,353) | ​ |  | (70,590) | ​ |  | (77,555) | ​ |  | (84,006) | ​ |  | (87,872)
Fair value of equity awards granted in covered fiscal year and that were unvested at end of such covered fiscal year - valued at year-end | ​ |  | 72,514 | ​ |  | 81,533 | ​ |  | 56,588 | ​ |  | 68,008 | ​ |  | 138,552
Change in fair value from end of prior fiscal year to end of covered fiscal year for awards made in prior fiscal years that were unvested at end of current fiscal year | ​ |  | 79,650 | ​ |  | 94,606 | ​ |  | (44,694) | ​ |  | 8,761 | ​ |  | 133,187
Change in fair value from end of prior fiscal year to vesting date for awards made in prior fiscal years that vested during covered fiscal year | ​ |  | 26,615 | ​ |  | 25,750 | ​ |  | (22,618) | ​ |  | 3,526 | ​ |  | 50,818
Total compensation actually paid to PEO | ​ | $ | 791,200 | ​ | $ | 784,965 | ​ | $ | 572,862 | ​ | $ | 648,187 | ​ | $ | 830,649
Non-PEO NEO Average Total Compensation Amount | $ 499,822 | 445,241 | 488,862 | 388,627 | 353,265
Non-PEO NEO Average Compensation Actually Paid Amount | $ 599,941 | 434,562 | 424,478 | 386,517 | 474,380
Adjustment to Non-PEO NEO Compensation Footnote |
(4) | Represents the average of the total compensation actually paid to our named non-PEO NEOs as reported in the SCT, as computed in accordance with Item 402(v) of Regulation S-K. The amounts do not reflect the actual amount of compensation earned by or paid to the non-PEO NEOs during the applicable year. In accordance with the requirements of Item 402(v) of Regulation S-K, the following adjustments were made to average total compensation for the non-PEO NEOs as a group for each year to determine the compensation actually paid:
​ Reconciliation of Non-PEO NEOs SCT Total and Compensation Actually Paid ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2025 |  | 2024 |  | 2023 |  | 2022 |  | 2021
Total compensation as reported in SCT | ​ | $ | 499,822 | ​ | $ | 445,241 | ​ | $ | 488,862 | ​ | $ | 388,627 | ​ | $ | 353,265
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value of equity awards granted during covered fiscal year | ​ |  | (87,400) | ​ |  | (113,666) | ​ |  | (111,725) | ​ |  | (46,098) | ​ |  | (48,516)
Fair value of equity awards granted in covered fiscal year and that were unvested at end of such covered fiscal year - valued at year-end | ​ |  | 79,835 | ​ |  | 86,734 | ​ |  | 84,409 | ​ |  | 37,184 | ​ |  | 77,736
Change in fair value from end of prior fiscal year to end of covered fiscal year for awards made in prior fiscal years that were unvested at end of current fiscal year | ​ |  | 89,436 | ​ |  | 10,932 | ​ |  | (24,802) | ​ |  | 4,922 | ​ |  | 67,595
Change in fair value from end of prior fiscal year to vesting date for awards made in prior fiscal years that vested during covered fiscal year | ​ |  | 18,248 | ​ |  | 5,320 | ​ |  | (12,266) | ​ |  | 1,882 | ​ |  | 24,300
Total average compensation actually paid to non-PEO NEOs | ​ | $ | 599,941 | ​ | $ | 434,562 | ​ | $ | 424,478 | ​ | $ | 386,517 | ​ | $ | 474,380
Compensation Actually Paid vs. Total Shareholder Return | The following graphs show the relationship between the compensation actually paid to our PEO and the average of the compensation actually paid to our other NEOs to our total shareholder return, net income and diluted earnings per common share and the relationship between our cumulative total shareholder return and the cumulative total shareholder return of the peer group, each over the five most recently completed fiscal years as reported in the table above: ​ |  |  |  |
Compensation Actually Paid vs. Net Income |  |  |  |  |
Compensation Actually Paid vs. Company Selected Measure | ​ |  |  |  |
Total Shareholder Return Vs Peer Group | ​ |  |  |  |
Tabular List, Table | Financial Performance Measures Used to Link Executive Compensation to Company Performance The following list presents the most important financial measures, as determined by the Compensation Committee, used by the Company to link compensation actually paid to our NEOs, for fiscal year 2025, to the Company’s performance:
| ● | Diluted earnings per common share
| ● | Tangible return on average tangible common equity
| ● | Return on average assets
| ● | Net interest margin
| ● | Non-performing asset ratio
Total Shareholder Return Amount | $ 246.84 | 199.53 | 167.21 | 193.14 | 188.77
Peer Group Total Shareholder Return Amount | 186.37 | 152.45 | 116.1 | 143.56 | 162.61
Net Income (Loss) | $ 58,578,000 | $ 50,182,000 | $ 39,237,000 | $ 47,169,000 | $ 47,180,000
Company Selected Measure Amount | $ / shares | 5.18 | 4.42 | 3.85 | 5.21 | 5.22
PEO Name | Greg A. Steffens |  |  |  |
Measure:: 1 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Diluted earnings per common share |  |  |  |
Non-GAAP Measure Description |
(8) | Represents our diluted earnings per common share, for each year indicated, which we believe represents the most important financial performance measure that was used to link compensation actually paid to our PEO and non-PEO NEOs for the most recent fiscal year to Company performance.
Measure:: 2 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Tangible return on average tangible common equity |  |  |  |
Measure:: 3 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Return on average assets |  |  |  |
Measure:: 4 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Net interest margin |  |  |  |
Measure:: 5 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Non-performing asset ratio |  |  |  |
PEO | Fair value of equity awards granted in covered fiscal year and that were unvested at end of such covered fiscal year - valued at year-end |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ 72,514 | $ 81,533 | $ 56,588 | $ 68,008 | $ 138,552
PEO | Change in fair value from end of prior fiscal year to end of covered fiscal year for awards made in prior fiscal years that were unvested at end of current fiscal year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 79,650 | 94,606 | (44,694) | 8,761 | 133,187
PEO | Change in fair value from end of prior fiscal year to vesting date for awards made in prior fiscal years that vested during covered fiscal year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 26,615 | 25,750 | (22,618) | 3,526 | 50,818
PEO | Equity Awards Adjustments Year End Fair Value Of Awards Granted In Current Year [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | (78,353) | (70,590) | (77,555) | (84,006) | (87,872)
Non-PEO NEO | Fair value of equity awards granted in covered fiscal year and that were unvested at end of such covered fiscal year - valued at year-end |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 79,835 | 86,734 | 84,409 | 37,184 | 77,736
Non-PEO NEO | Change in fair value from end of prior fiscal year to end of covered fiscal year for awards made in prior fiscal years that were unvested at end of current fiscal year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 89,436 | 10,932 | (24,802) | 4,922 | 67,595
Non-PEO NEO | Change in fair value from end of prior fiscal year to vesting date for awards made in prior fiscal years that vested during covered fiscal year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 18,248 | 5,320 | (12,266) | 1,882 | 24,300
Non-PEO NEO | Equity Awards Adjustments Year End Fair Value Of Awards Granted In Current Year [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ (87,400) | $ (113,666) | $ (111,725) | $ (46,098) | $ (48,516)

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