Employee Benefit Plans - Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 79,819	$ 79,189	$ 104,559
Brewmatic Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	75,904	75,411	3,719
Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	3,915	3,778	$ 3,629
Level 1 | Brewmatic Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	0
Level 1 | Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	0
Level 2 | Brewmatic Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	0
Level 2 | Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	0
Level 3 | Brewmatic Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	0
Level 3 | Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	0	0
Fair Value Measured at Net Asset Value Per Share [Member] | Brewmatic Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	75,904	75,411
Fair Value Measured at Net Asset Value Per Share [Member] | Hourly Employees’ Plan
Defined Benefit Plan Disclosure
Fair value of plan assets at measurement date	$ 3,915	$ 3,778