XML 84 R71.htm IDEA: XBRL DOCUMENT
v3.25.3

PROFIT SHARING PLANS (Details) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2025 USD ($) plan | Sep. 30, 2024 USD ($)
Defined Contribution Plan Disclosure [Line Items] |  |
Number of profit sharing plans | plan | 2 |
Employee's maximum voluntary contribution as percentage of their compensation | 100.00% |
Company's matching contributions to the profit sharing plan (net of employee forfeitures) | $ | $ 2.1 | $ 2.0
AMCON Plan |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Percentage of employer's contribution matching first 2 percent of employee's compensation | 100.00% |
Percentage of first portion of employee's compensation eligible for employer's matching contribution | 2.00% |
Percentage of employer's contribution matching next 4 percent of employee's compensation | 50.00% |
Percentage of second portion of employee's compensation eligible for employer's matching contribution | 4.00% |
Maximum matching percentage of employee compensation | 4.00% |
Sledd Plan |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Maximum matching percentage of employee compensation | 5.00% |
Team Sledd Plan |  |
Defined Contribution Plan Disclosure [Line Items] |  |
Employee matching contribution | 100.00% |

X
- Definition Represents the first level of employee contributions (percentage of compensation) which are matched by the employer. + References No definition available. + Details
Name: | dit_DefinedContributionPlanEmployerMatchEmployeeContributionLevelOne
Namespace Prefix: | dit_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the second level of employee contributions (percentage of compensation) which are matched by the employer. + References No definition available. + Details
Name: | dit_DefinedContributionPlanEmployerMatchEmployeeContributionLevelTwo
Namespace Prefix: | dit_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the employer matching contribution of the first level of employee contributions. + References No definition available. + Details
Name: | dit_DefinedContributionPlanEmployerMatchLevelOne
Namespace Prefix: | dit_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the employer matching contribution of the second level of employee contributions. + References No definition available. + Details
Name: | dit_DefinedContributionPlanEmployerMatchLevelTwo
Namespace Prefix: | dit_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the maximum percentage of employee compensation, by the terms of the plan, that the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | dit_DefinedContributionPlanMaximumEmployeeContributionAsPercentageOfCompensation
Namespace Prefix: | dit_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of profit sharing plans. + References No definition available. + Details
Name: | dit_NumberOfProfitSharingPlans
Namespace Prefix: | dit_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
Name: | us-gaap_DefinedContributionPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=dit_AmconPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=dit_SleddPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=dit_TeamSleddPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |