Employee Benefit Plans - Components of Net Periodic Benefit Cost and Amounts Recognized in Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Postretirement Benefits Other Than Pension
Components of net periodic benefit cost
Service cost	$ 1,634	$ 1,564
Interest cost	1,319	1,205
Expected return on plan assets	0	0
Amortization of net (gain) loss	(794)	(802)
Amortization of prior service cost (credit)	230	230
Amount recognized due to special event (curtailment)	0
Net periodic benefit cost	1,929	1,737
Other changes recognized in OCI
Amortization of transition asset/(obligation)	0	0
Total recognized in other comprehensive income	9,977	653
Total recognized in net periodic benefit cost and OCI	11,906	2,390
Farmer Brothers Plan
Components of net periodic benefit cost
Service cost	0	4,609
Interest cost	5,846	5,999
Expected return on plan assets	(6,569)	(5,323)
Amortization of net (gain) loss	(570)	(2,871)
Amortization of prior service cost (credit)	0	(122)
Amount recognized due to special event (curtailment)	0	1,456
Net periodic benefit cost	(153)	9,734
Other changes recognized in OCI
Net (gain)/loss	23,389	(12,705)
Prior service cost/(credit)	0	0
Amortization of transition asset/(obligation)	0	0
Amount recognized due to special event (curtailment)	0	(10,016)
Total recognized in other comprehensive income	22,819	(25,714)
Total recognized in net periodic benefit cost and OCI	22,666	(15,980)
Weighted average assumptions used to determine benefit obligations
Discount rate	5.60%	5.60%
Expected long-term return on plan assets	8.25%	8.25%
Brewmatic Plan
Components of net periodic benefit cost
Service cost	39	57
Interest cost	197	199
Expected return on plan assets	(213)	(179)
Amortization of net (gain) loss	(87)	(119)
Amortization of prior service cost (credit)	(18)	(18)
Amount recognized due to special event (curtailment)	0	0
Net periodic benefit cost	128	214
Other changes recognized in OCI
Net (gain)/loss	654	(480)
Prior service cost/(credit)	0	7
Amortization of transition asset/(obligation)	0	0
Amount recognized due to special event (curtailment)	0	0
Total recognized in other comprehensive income	549	(610)
Total recognized in net periodic benefit cost and OCI	677	(396)
Weighted average assumptions used to determine benefit obligations
Discount rate	5.60%	5.60%
Expected long-term return on plan assets	8.25%	8.25%
Hourly Employees' Plan
Components of net periodic benefit cost
Service cost	456	409
Interest cost	59	32
Expected return on plan assets	(28)	(9)
Amortization of net (gain) loss	0	0
Amortization of prior service cost (credit)	0	0
Amount recognized due to special event (curtailment)	0	0
Net periodic benefit cost	487	432
Other changes recognized in OCI
Net (gain)/loss	(6)	37
Prior service cost/(credit)	0	0
Amortization of transition asset/(obligation)	0	0
Amount recognized due to special event (curtailment)	0	0
Total recognized in other comprehensive income	(6)	37
Total recognized in net periodic benefit cost and OCI	$ 481	$ 469
Weighted average assumptions used to determine benefit obligations
Discount rate	5.60%	5.60%
Expected long-term return on plan assets	8.25%	8.25%
Rate of compensation increase	3.00%	3.00%