Employee Benefit Plans - Components of Net Periodic Benefit Cost and Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Components of net periodic benefit cost
Interest cost	$ 4,236	$ 5,222
Expected return on plan assets	(4,406)	(5,246)
Amortization of net loss	1,479	1,506
Pension settlement charge	0	10,942
Net periodic benefit cost	1,309	12,424
Other changes recognized in OCI
Net loss (1)	14,779	9,193
Actuarial (gain) loss	13,994	7,260
Prior service cost (credit)	0	0
Amortization of net loss	(1,479)	(1,506)
Pension settlement charge	0	(10,942)
Allocation of net Loss - Plan merger	0	0
Net loss due to annuity purchase	0	814
Total recognized in OCI	13,300	(2,441)
Total recognized in net periodic benefit cost and OCI	$ 14,609	$ 9,983
Weighted average assumptions used to determine benefit obligations
Discount rate	3.45%	4.05%
Expected long-term return on plan assets	6.75%	6.75%
Farmer Brothers Plan
Components of net periodic benefit cost
Interest cost		$ 2,722
Expected return on plan assets		(2,767)
Amortization of net loss		710
Pension settlement charge		1,356
Net periodic benefit cost		2,021
Other changes recognized in OCI
Net loss (1)		7,433
Actuarial (gain) loss		(1,571)
Prior service cost (credit)		0
Amortization of net loss		(710)
Pension settlement charge		(1,356)
Allocation of net Loss - Plan merger		(56,446)
Net loss due to annuity purchase		0
Total recognized in OCI		(51,079)
Total recognized in net periodic benefit cost and OCI		$ (49,058)
Weighted average assumptions used to determine benefit obligations
Discount rate		4.05%
Expected long-term return on plan assets		0.00%
Brewmatic Plan
Components of net periodic benefit cost
Interest cost	$ 4,084	$ 2,339
Expected return on plan assets	(4,174)	(2,257)
Amortization of net loss	1,475	796
Pension settlement charge	0	9,586
Net periodic benefit cost	1,385	10,464
Other changes recognized in OCI
Net loss (1)	14,225	1,413
Actuarial (gain) loss	13,433	8,482
Prior service cost (credit)	0	0
Amortization of net loss	(1,475)	(796)
Pension settlement charge	0	(9,586)
Allocation of net Loss - Plan merger	0	56,446
Net loss due to annuity purchase	0	814
Total recognized in OCI	12,750	48,291
Total recognized in net periodic benefit cost and OCI	$ 14,135	$ 58,755
Weighted average assumptions used to determine benefit obligations
Discount rate	3.45%	4.10%
Expected long-term return on plan assets	6.75%	6.75%
Hourly Employees’ Plan
Components of net periodic benefit cost
Interest cost	$ 152	$ 161
Expected return on plan assets	(232)	(222)
Amortization of net loss	4	0
Pension settlement charge	0	0
Net periodic benefit cost	(76)	(61)
Other changes recognized in OCI
Net loss (1)	554	347
Actuarial (gain) loss	561	349
Prior service cost (credit)	0	0
Amortization of net loss	(4)	0
Pension settlement charge	0	0
Allocation of net Loss - Plan merger	0	0
Net loss due to annuity purchase	0	0
Total recognized in OCI	550	347
Total recognized in net periodic benefit cost and OCI	$ 474	$ 286