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Share-Based Compensation - Weighted Average Assumptions Used (Details) (2007 Amended and Restated Long-term Incentive Plan [Member], USD $) | 3 Months Ended
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Dec. 31, 2014
Non-qualified Stock Options with Time-based Vesting (NQO) [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Weighted average fair value of PNQs | $ 0.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = farm_NonqualifiedStockOptionswithTimebasedVestingNQOMember / us-gaap_PlanNameAxis = farm_A2007AmendedandRestatedLongtermIncentivePlanMember
Non-qualified Stock Options with Performance-based and Time-based Vesting (PNQ) [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Weighted average fair value of PNQs | $ 0.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = farm_NonqualifiedStockOptionswithPerformancebasedandTimebasedVestingPNQMember / us-gaap_PlanNameAxis = farm_A2007AmendedandRestatedLongtermIncentivePlanMember

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- Details
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Balance Type: | na
Period Type: | duration

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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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Data Type: | num:perShareItemType
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Period Type: | duration