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Employee Benefit Plans - Narrative (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
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Jun. 30, 2012 quarter | Mar. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Number of non-pension multiemployer plans that the Company participates in |  | 10 farm_MultiemployerPlansNumberOfPlans
Labor Management Pension Fund [Member] |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Withdrawal obligation | $ 4.3 us-gaap_MultiemployerPlansWithdrawalObligation / us-gaap_MultiemployerPlanNameAxis = farm_LaborManagementPensionFundMember |
Quarterly installment payments on estimated withdrawal liability | $ 0.1 farm_MultiemployerPlansWithdrawalObligationMonthlyPaymentElectionPeriodicPaymentAmount / us-gaap_MultiemployerPlanNameAxis = farm_LaborManagementPensionFundMember |
Number of quarters relating to installment payments on estimated withdrawal liability | 80 farm_MultiemployerPlansWithdrawalObligationMonthlyPaymentElectionPeriodicPaymentPeriod / us-gaap_MultiemployerPlanNameAxis = farm_LaborManagementPensionFundMember |
Multiemployer Plans, Pension [Member] |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Number of non-pension multiemployer plans that the Company participates in |  | 2 farm_MultiemployerPlansNumberOfPlans / us-gaap_MultiemployerPlanTypeAxis = us-gaap_MultiemployerPlansPensionMember

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- Definition Multiemployer Plans, Number of Plans + References No definition available. + Details
Name: | farm_MultiemployerPlansNumberOfPlans
Namespace Prefix: | farm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Multiemployer Plans, Withdrawal Obligation, Monthly Payment Election, Periodic Payment Amount + References No definition available. + Details
Name: | farm_MultiemployerPlansWithdrawalObligationMonthlyPaymentElectionPeriodicPaymentAmount
Namespace Prefix: | farm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Multiemployer Plans, Withdrawal Obligation, Monthly Payment Election, Periodic Payment Period + References No definition available. + Details
Name: | farm_MultiemployerPlansWithdrawalObligationMonthlyPaymentElectionPeriodicPaymentPeriod
Namespace Prefix: | farm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References No definition available. + Details
Name: | us-gaap_MultiemployerPlansWithdrawalObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_MultiemployerPlanNameAxis=farm_LaborManagementPensionFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_MultiemployerPlanTypeAxis=us-gaap_MultiemployerPlansPensionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |