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v3.19.3.a.u2

Employee Benefit Plans - Narrative (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) plan shares | Dec. 31, 2018 USD ($) shares
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Amount | $ 0.6 | $ 0.4 | $ 1.3 | $ 0.9
Other Postretirement Benefit Plan |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Multiemployer plans, number of plans | plan |  |  | 9 |
Restated and Amended 401K Plan |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Defined contribution plan, employer matching contribution, percent of eligible income |  |  | 4.00% |
Defined Contribution Plan, Number of Shares Contributed | shares |  |  | 54,025 | 109,648.7
Defined Contribution Plan, Employer Discretionary Contribution Amount |  |  | $ 0.6 | $ 1.4

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- Definition Defined Contribution Plan, Employer Matching Contribution, Amount + References No definition available. + Details
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Namespace Prefix: | farm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Defined Contribution Plan, Number of Shares Contributed + References No definition available. + Details
Name: | farm_DefinedContributionPlanNumberofSharesContributed
Namespace Prefix: | farm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Multiemployer Plan, Number of Plans + References No definition available. + Details
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Namespace Prefix: | farm_
Data Type: | xbrli:integerItemType
Balance Type: | na
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- 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 No definition available. + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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