Employee Benefit Plans - Change in Projected Benefit Obligation, Plan Assets and Net Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Amounts recognized in balance sheet
Current liabilities	$ (347)	$ (347)
Amounts recognized in balance sheet
Total accumulated OCI (not adjusted for applicable tax)	$ 60,420	27,792
Weighted average assumptions used to determine benefit obligations
Discount rate	4.70%
Farmer Brothers Plan
Change in projected benefit
Benefit obligation at the beginning of the year	$ 133,136	126,205
Service cost	0	0
Interest cost	5,393	5,545
Actuarial (gain) loss	4,596	7,069
Benefits paid	(6,163)	(5,683)
Benefit obligation at the end of the year	136,962	133,136	$ 126,205
Change in plan assets
Fair value of plan assets at the beginning of the year	98,426	88,097
Actual return on plan assets	1,731	15,046
Employer contributions	821	966
Benefits paid	(6,163)	(5,683)
Fair value of plan assets at the ending of the year	94,815	98,426	88,097
Funded status at end of year (underfunded)/overfunded	(42,147)	(34,710)
Amounts recognized in balance sheet
Noncurrent liabilities	(42,147)	(34,710)
Amounts Recognized in Balance Sheet	(42,147)	(34,710)
Amounts recognized in balance sheet
Total net (gain) loss	50,743	42,093
Total accumulated OCI (not adjusted for applicable tax)	$ 50,743	$ 42,093
Weighted average assumptions used to determine benefit obligations
Discount rate	4.40%	4.15%
Brewmatic Plan
Change in projected benefit
Benefit obligation at the beginning of the year	$ 3,991	$ 3,946
Service cost	0	0
Interest cost	160	171
Actuarial (gain) loss	188	153
Benefits paid	(275)	(279)
Benefit obligation at the end of the year	4,064	3,991	3,946
Change in plan assets
Fair value of plan assets at the beginning of the year	3,435	3,063
Actual return on plan assets	66	521
Employer contributions	65	130
Benefits paid	(275)	(279)
Fair value of plan assets at the ending of the year	3,291	3,435	3,063
Funded status at end of year (underfunded)/overfunded	(773)	(556)
Amounts recognized in balance sheet
Noncurrent liabilities	(773)	(556)
Amounts Recognized in Balance Sheet	(773)	(556)
Amounts recognized in balance sheet
Total net (gain) loss	1,965	1,665
Total accumulated OCI (not adjusted for applicable tax)	$ 1,965	$ 1,665
Weighted average assumptions used to determine benefit obligations
Discount rate	4.40%	4.15%
Hourly Employees' Plan
Change in projected benefit
Benefit obligation at the beginning of the year	$ 2,619	$ 2,056
Service cost	386	401
Interest cost	108	92
Actuarial (gain) loss	56	81
Benefits paid	(24)	(11)
Benefit obligation at the end of the year	3,145	2,619	2,056
Change in plan assets
Fair value of plan assets at the beginning of the year	1,629	1,248
Actual return on plan assets	10	207
Employer contributions	489	185
Benefits paid	(24)	(11)
Fair value of plan assets at the ending of the year	2,104	1,629	1,248
Funded status at end of year (underfunded)/overfunded	(1,041)	(990)
Amounts recognized in balance sheet
Noncurrent liabilities	(1,041)	(990)
Amounts Recognized in Balance Sheet	(1,041)	(990)
Amounts recognized in balance sheet
Total net (gain) loss	237	73
Total accumulated OCI (not adjusted for applicable tax)	$ 237	$ 73
Weighted average assumptions used to determine benefit obligations
Discount rate	4.40%	4.15%
Postretirement Benefits Other Than Pension
Change in projected benefit
Benefit obligation at the beginning of the year	$ 20,889	$ 16,701
Service cost	1,195	936	1,972
Interest cost	943	810	969
Plan participants contributions	711	708
Actuarial (gain) loss	2,751	3,141
Benefits paid	(1,967)	(1,407)
Benefit obligation at the end of the year	24,522	20,889	16,701
Change in plan assets
Fair value of plan assets at the beginning of the year	0	0
Employer contributions	1,256	699
Plan participants contributions	711	708
Benefits paid	(1,967)	(1,407)
Fair value of plan assets at the ending of the year	0	0	$ 0
Funded status at end of year (underfunded)/overfunded	(24,522)	(20,889)
Amounts recognized in balance sheet
Noncurrent assets	0	0
Current liabilities	(1,051)	(919)
Noncurrent liabilities	(23,471)	(19,970)
Amounts Recognized in Balance Sheet	(24,522)	(20,889)
Amounts recognized in balance sheet
Net (gain) loss subject to amortization	(2,965)	(6,216)
Transition (asset) obligation	(13,963)	(15,720)
Prior service cost (credit)	0	0
Total accumulated OCI (not adjusted for applicable tax)	$ (16,928)	$ (21,936)