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Employee Benefit Plans - Fair Value of Plan Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
--- | --- | --- | ---
Farmer Brothers Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | $ 97,211 | $ 97,304 | $ 91,201
Farmer Brothers Plan | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 0 | 0 |
Farmer Brothers Plan | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 0 | 0 |
Farmer Brothers Plan | Level 3 |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 0 | 0 |
Farmer Brothers Plan | Fair Value Measured at Net Asset Value Per Share [Member] |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 97,211 | 97,304 |
Brewmatic Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 3,719 | 3,115 | 2,989
Brewmatic Plan | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 0 | 0 |
Brewmatic Plan | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 0 | 0 |
Brewmatic Plan | Level 3 |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 0 | 0 |
Brewmatic Plan | Fair Value Measured at Net Asset Value Per Share [Member] |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 3,719 | 3,115 |
Hourly Employees’ Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 3,629 | 2,999 | $ 2,447
Hourly Employees’ Plan | Level 1 |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 0 | 0 |
Hourly Employees’ Plan | Level 2 |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 0 | 0 |
Hourly Employees’ Plan | Level 3 |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | 0 | 0 |
Hourly Employees’ Plan | Fair Value Measured at Net Asset Value Per Share [Member] |  |  |
Defined Benefit Plan Disclosure |  |  |
Fair value of plan assets at measurement date | $ 3,629 | $ 2,999 |

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- Definition Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees. + 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 (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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