Employee Benefit Plans - Narrative (Details)	1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2020 USD ($) plan hour shares	Jun. 30, 2019 USD ($) shares	Jun. 30, 2018 USD ($)	Jan. 09, 2019 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation			$ 25,000
Multiemployer Plans, Estimated Employer Contributions in Next Fiscal Year			4,500,000
Multiemployer Plan, Contributions by Employer		$ 4,800,000	$ 4,200,000	$ 5,200,000
Plan assets by category			100.00%	100.00%
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		$ 2,000,000.0	$ 1,800,000	$ 2,200,000
Defined benefit plan, discount rate				4.05%
Prior service cost (credit)			0	$ 0
Amortization of net gain (loss)			(5,600,000)
Amortization of prior service cost (credit)			(9,000,000.0)
Postretirement benefits curtailment gains and pension settlement (charge)			5,760,000	(10,948,000)	$ 0
Multiemployer Plans, Withdrawal Obligation, Assessment			500,000			$ 500,000
Other Commitment, Due after Fifth Year			200,000
Pension settlement			$ 0	(24,448,000)
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
Other Postretirement Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)			$ (14,600,000)
Multiemployer plans, number of plans | plan			9
Expected employer contributions in the next fiscal year			$ 750,000
Defined benefit plan, discount rate			0.06%
Defined benefit plan, ultimate health care cost trend rate			7.65%
Defined benefit plan, health care cost rate trend rate			4.50%
Prior service cost (credit)			$ (13,441,000)	$ 0
Pension settlement			$ (5,800,000)
Real estate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets by category			6.00%	6.00%
WCTPP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Multiemployer Plans, Withdrawal Obligation, Assessment			$ 3,400,000
Local 807 Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	$ 3,000,000.0
Multiemployer plan, quarterly installments for withdrawal liability	$ 91,000
Farmer Brothers Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, discount rate				4.10%
Prior service cost (credit)				$ 0
Postretirement benefits curtailment gains and pension settlement (charge)			(10,900,000)
Pension settlement				$ (3,162,000)
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			$ 1,300,000
Plan assets by category			100.00%	100.00%
Expected employer contributions in the next fiscal year			$ 5,800,000
Defined benefit plan, discount rate			2.55%	3.45%
Prior service cost (credit)			$ 0	$ 0
Pension settlement			$ 0	$ (21,286,000)
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			$ (41,000)
Plan assets by category			100.00%	100.00%
Defined benefit plan, discount rate			2.55%	3.45%
Prior service cost (credit)			$ 0	$ 0
Pension settlement			$ 0	$ 0
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%
Employee-related | WCTPP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Benefit Obligation, Payment for Settlement			$ 153,822
Multiemployer plan, quarterly installments for withdrawal liability			$ 190,507
Restated and Amended 401K Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, employer matching contribution percent			100.00%
Defined contribution plan, shares contributed | shares			290,567	90,105
Defined contribution plan, contribution amount			$ 2,900,000	$ 1,600,000
Defined contribution plan, employer matching contribution, percent of eligible income			4.00%