Employee Benefit Plans (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2018 USD ($) hour plan	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jan. 05, 2015 USD ($)	Nov. 18, 2014 USD ($)	Jun. 30, 2012 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Withdrawal obligation	$ 3,800
Defined contribution plan, hours threshold for eligibility | hour	1,000
Defined contribution plan, employer matching contribution percent	50.00%
Defined contribution plan, employer matching contribution, percent of eligible income	6.00%
Defined contribution plan, employer matching contribution, annual vesting percent	20.00%
Defined contribution plan, vesting period	5 years
Defined contribution plan, automatic vesting age	65 years
Defined contribution plan, employee vesting percent	100.00%
Defined contribution plan, employer matching contribution	$ 2,000	$ 1,600	$ 1,600
Defined benefit plan, discount rate	4.30%
Defined benefit plan, ultimate health care cost trend rate	8.10%
Defined benefit plan, health care cost rate trend rate	4.50%
Amortization of net gain (loss)	$ (900)
Amortization of prior service cost (credit)	$ (1,800)
Multiemployer Plans, Defined Benefit Pension Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Multiemployer plans, number of plans | plan	2
Multiemployer Plans, Defined Contribution Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Multiemployer plans, number of plans | plan	1
Other Postretirement Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Multiemployer plans, number of plans | plan	9
Expected employer contributions in the next fiscal year	$ 827
Labor Management Pension Fund
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Withdrawal obligation	3,800			$ 4,900	$ 4,400	$ 4,300
Farmer Brothers Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amount expected to be recognized as a component of net periodic benefit cost in the next fiscal year	$ 1,300
Plan assets by category	0.00%	0.00%
Expected employer contributions in the next fiscal year	$ 2,500
Defined benefit plan, discount rate	4.05%	3.80%
Farmer Brothers Plan | Real estate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets by category	6.00%	6.00%
Brewmatic Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amount expected to be recognized as a component of net periodic benefit cost in the next fiscal year	$ (13)
Plan assets by category	100.00%	100.00%
Defined benefit plan, discount rate	4.05%	3.80%
Brewmatic Plan | Real estate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets by category	6.00%	6.00%
Hourly Employees’ Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amount expected to be recognized as a component of net periodic benefit cost in the next fiscal year	$ (61)
Plan assets by category	100.00%	100.00%
Defined benefit plan, discount rate	4.05%	3.80%
Hourly Employees’ Plan | Real estate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets by category	6.00%	6.00%