Employee Benefit Plans - Description of Investment Policy (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Farmer Brothers Plan
Defined Benefit Plan Disclosure
Projected benefit obligation	$ 152,325	$ 136,962	$ 133,136
Accumulated benefit obligation	152,325	136,962
Fair value of plan assets at measurement date	$ 91,201	$ 94,815	98,426
Plan assets by category	0.00%	100.00%
Farmer Brothers Plan \| Equity Securities
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 58,094	$ 47,340
Plan assets by category	64.00%	50.00%
Farmer Brothers Plan \| Debt Securities
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 27,586	$ 37,789
Plan assets by category	30.00%	40.00%
Farmer Brothers Plan \| Real Estate
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 5,521	$ 9,686
Plan assets by category	6.00%	10.00%
Brewmatic Plan
Defined Benefit Plan Disclosure
Projected benefit obligation	$ 4,574	$ 4,064	3,991
Accumulated benefit obligation	4,574	4,064
Fair value of plan assets at measurement date	$ 2,989	$ 3,291	3,435
Plan assets by category	100.00%	100.00%
Brewmatic Plan \| Equity Securities
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 1,909	$ 1,638
Plan assets by category	64.00%	50.00%
Brewmatic Plan \| Debt Securities
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 899	$ 1,322
Plan assets by category	30.00%	40.00%
Brewmatic Plan \| Real Estate
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 181	$ 331
Plan assets by category	6.00%	10.00%
Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Projected benefit obligation	$ 4,329	$ 3,145	2,619
Accumulated benefit obligation	4,329	3,145
Fair value of plan assets at measurement date	$ 2,447	$ 2,104	$ 1,629
Plan assets by category	100.00%	100.00%
Hourly Employees’ Plan \| Equity Securities
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 1,542	$ 1,050
Plan assets by category	63.00%	50.00%
Hourly Employees’ Plan \| Debt Securities
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 758	$ 839
Plan assets by category	31.00%	40.00%
Hourly Employees’ Plan \| Real Estate
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 147	$ 215
Plan assets by category	6.00%	10.00%

For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Accumulated Benefit Obligation
-URI http://asc.fasb.org/extlink&oid=6503844

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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- Definition

1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Projected Benefit Obligation
-URI http://asc.fasb.org/extlink&oid=6522206

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Accumulated Postretirement Benefit Obligation
-URI http://asc.fasb.org/extlink&oid=6503904

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No definition available.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Section 35
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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