Employee Benefit Plans - Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 79,189	$ 104,559	$ 103,418
Farmer Brothers Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	97,211	97,304
Brewmatic Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	75,411	3,719	3,115
Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	3,778	3,629	$ 2,999
Level 1 | Farmer Brothers Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date		0
Level 1 | Brewmatic Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	0
Level 1 | Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	0
Level 2 | Farmer Brothers Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date		0
Level 2 | Brewmatic Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	0
Level 2 | Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	0
Level 3 | Farmer Brothers Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date		0
Level 3 | Brewmatic Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	0
Level 3 | Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	0
Fair Value Measured at Net Asset Value Per Share [Member] | Farmer Brothers Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date		97,211
Fair Value Measured at Net Asset Value Per Share [Member] | Brewmatic Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	75,411	3,719
Fair Value Measured at Net Asset Value Per Share [Member] | Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 3,778	$ 3,629