Employee Benefit Plans - Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 78,098	$ 95,111	$ 79,819
Farmer Brothers Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	74,250	90,508	75,904
Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	3,848	4,603	$ 3,915
Level 1 | Farmer Brothers 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	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	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 | Farmer Brothers Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	74,250	90,508
Fair Value Measured at Net Asset Value Per Share | Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 3,848	$ 4,603