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Benefit Plans - Narrative (Details) |  |  |  |  |  | 3 Months Ended | 12 Months Ended
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Jan. 21, 2026 shares | Dec. 31, 2025 shares | Jun. 10, 2025 | Apr. 25, 2025 $ / shares shares | Dec. 18, 2024 | Mar. 31, 2026 USD ($) yr $ / shares shares | Dec. 31, 2025 $ / shares shares | Sep. 30, 2025 $ / shares | Jun. 30, 2025 $ / shares | Mar. 31, 2025 USD ($) $ / shares shares | Dec. 31, 2024 $ / shares | Sep. 30, 2024 USD ($) $ / shares | Jun. 30, 2024 $ / shares | Sep. 30, 2023 USD ($) | Mar. 31, 2026 USD ($) plan $ / shares shares | Mar. 31, 2025 USD ($) $ / shares shares | Mar. 31, 2024 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum contribution from employer |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |
Employer matching contribution, percent |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.00% |  |
Employer contribution, percent of match |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.00% |  |
Amount of cost recognized | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000 | $ 1,600,000 | $ 1,500,000
Number of executive retirement plans | plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |
Annual salary increase used for estimating unfunded liability |  |  |  |  |  | 3.50% |  |  |  |  |  |  |  |  |  |  |
Discount rate used for estimating unfunded liability |  |  |  |  |  | 6.00% |  |  |  |  |  |  |  |  | 6.00% |  |
Retirement age used for estimating unfunded liability | yr |  |  |  |  |  | 65 |  |  |  |  |  |  |  |  |  |  |
Stock Option Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted (in dollars per share) | $ / shares |  |  |  |  |  | $ 7.44 | $ (0.13) | $ (0.33) | $ 0.30 | $ 7.91 | $ 2.49 | $ 4.03 | $ 1.82 |  | $ 6.88 | $ 16.21 | $ 13.14
Weighted-average fair value at the grant date (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 86.69 | 58.73 | $ 69.00
2017 Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares available for grant (in shares) |  |  |  |  |  | 698,117 |  |  |  |  |  |  |  |  | 698,117 |  |
2025 Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares available for grant (in shares) |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  | 0 |  |
2008 and 2011 Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares available for grant (in shares) |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  | 0 |  |
Target 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00% |  |
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
EPS Targets (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 20.45 |  |  | $ 20.45 |  |
Target 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
EPS Targets (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18.40 |  |
Target 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |
Vested (in shares) |  |  |  | 88,497 |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
EPS Targets (in dollars per share) | $ / shares |  |  |  | $ 16.35 |  |  |  |  |  |  |  |  |  |  | $ 16.35 | $ 16.35 |
Forfeited during the period (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 34,415 |
Target 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Performance target, earnings per share target | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25.30 |  |
Stock Options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of authorized common stock reserved for issuance (in shares) |  |  |  |  |  | 3,750,000 |  |  |  |  |  |  |  |  | 3,750,000 |  |
Fair value of vested options | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 733,598 | $ 2,193,533 | $ 2,466,706
Compensation Cost Not yet Recognized |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total unrecognized stock-based compensation expense related to non-vested stock options | $ |  |  |  |  |  | $ 600,000 |  |  |  |  |  |  |  |  | $ 600,000 |  |
Weighted average period for recognition |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year 7 months 6 days |  |
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average period for recognition |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year 7 months 6 days |  |
Stock-based compensation | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,017,145 | $ 607,275 | $ (3,754,209)
Outstanding number |  |  |  |  |  | 134,809 |  |  |  | 169,154 |  |  |  |  | 134,809 | 169,154 |
Stock Options | Scenario 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding number |  |  |  |  |  | 9,450 |  |  |  |  |  |  |  |  | 9,450 |  |
Stock Options | Scenario 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding number |  |  |  |  |  | 12,587 |  |  |  |  |  |  |  |  | 12,587 |  |
Stock Options | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expiration period |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |
Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation Cost Not yet Recognized |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average period for recognition |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year 6 months |  |
Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted during the period (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 183,500 | 71,186 | 3,993
Granted during the period (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 156.72 | $ 111.64 | $ 120.12
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average period for recognition |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year 6 months |  |
Stock-based compensation | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18,325,357 | $ (20,296,243) | $ 2,071,122
Fair value of restricted stock vested in period | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,271,732 | $ 7,293,854 | 7,796,666
Unrecognized compensation cost related to unvested restricted stock | $ |  |  |  |  |  | $ 15,600,000 |  |  |  |  |  |  |  |  | $ 15,600,000 |  |
Forfeited during the period (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,031 |  |
Vested during the period (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 166,652 |  |
Outstanding (in shares) |  |  |  |  |  | 172,500 |  |  |  | 159,683 |  |  |  |  | 172,500 | 159,683 |
Restricted Stock | 2024 Long-term Incentive Program and Non-Employee Director Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of shares subject to performance shares |  |  | 100.00% |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited during the period (in shares) |  | 1,031 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vested during the period (in shares) | 6,469 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding (in shares) |  | 7,500 |  |  |  |  | 7,500 |  |  |  |  |  |  |  |  |  |
Performance Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of shares subject to performance shares |  |  |  | 72.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of shares forfeit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 28.00% |
Share based compensation expense (reversal) | $ |  |  |  |  |  |  |  |  |  |  |  | $ (18,500,000) |  | $ (4,900,000) |  | $ (3,500,000) |
Diluted (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 16.36 |
Performance Shares | 2024 Long-term Incentive Program and Non-Employee Director Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of shares subject to performance shares |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited during the period (in shares) |  | 6,132 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vested during the period (in shares) | 17,368 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding (in shares) |  | 23,500 |  |  |  |  | 23,500 |  |  |  |  |  |  |  |  |  |
Supplemental Employee Retirement Plans, Defined Benefit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pension and other postretirement benefits cost (reversal of cost) | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 | $ 500,000 | $ 500,000
Unfunded liability | $ |  |  |  |  |  | $ 5,100,000 |  |  |  | $ 5,300,000 |  |  |  |  | $ 5,100,000 | $ 5,300,000 |

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Namespace Prefix: |
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Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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X
- Details
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X
- Details
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Namespace Prefix: |
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Period Type: |

X
- Details
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- Details
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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