Share-Based Compensation - Weighted-average assumptions using Black-Scholes model (Details) - Farmer Bros. Co. Amended and Restated 2007 Long-term Incentive Plan - $ / shares	12 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
NQOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value		$ 10.38	$ 9.17	$ 5.69
Risk-free interest rate		1.50%	1.70%	0.90%
Dividend yield		0.00%	0.00%	0.00%
Average expected term		5 years 1 month 6 days	6 years	6 years
Expected stock price volatility		47.90%	50.40%	49.50%
PNQs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value	$ 10.16	$ 10.49
Risk-free interest rate	1.50%	1.80%
Dividend yield	0.00%	0.00%
Average expected term	5 years	6 years
Expected stock price volatility	47.90%	50.50%

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ 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 (f)(2)(ii)

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

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-Publisher FASB

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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.

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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

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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