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Employee Benefit Plans - Defined Contribution Plans (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Sep. 30, 2015 | Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract] |  |
Defined Contribution Plan, 401(k) Plan, Employer Matching Contribution, Amount | $ 0.4 | $ 0.4
Defined Contribution Plan, 401(k) Plan Employer Matching Contribution, Percentage of Employee Contribution | 50.00% |
Defined Contribution Plan, 401(k) Plan Employer Matching Contribution, Percent of Employees' Gross Pay | 6.00% |
Defined Contribution Plan, 401(k) Plan, Employers Matching Contribution, Annual Vesting Percentage | 20.00% |
Defined Contribution Plan, 401(k) Plan, Vesting Period | 5 years |
Defined Contribution Plan, 401(k) Plan, Automatic Vesting Age | 65 years |
Defined Contribution Plan, Employee Contribution Percentage Vested, Percent | 100.00% |

X
- Definition Defined Contribution Plan, Automatic Vesting Age + References No definition available. + Details
Name: | farm_DefinedContributionPlanAutomaticVestingAge
Namespace Prefix: | farm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Contribution Plan, Employee Contribution Percentage Vested, Percent + References No definition available. + Details
Name: | farm_DefinedContributionPlanEmployeeContributionPercentageVestedPercent
Namespace Prefix: | farm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

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- Definition Defined Contribution Plan, Employer Matching Contribution, Percentage of Employee Contribution + References No definition available. + Details
Name: | farm_DefinedContributionPlanEmployerMatchingContributionPercentageOfEmployeeContribution
Namespace Prefix: | farm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Defined Contribution Plan, Vesting Period + References No definition available. + Details
Name: | farm_DefinedContributionPlanVestingPeriod
Namespace Prefix: | farm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of employer's matching contributions to a defined contribution plan that vests in a given year. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration