Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2017
Property, Plant and Equipment
Preferred stock, par value (in US$ per share)	$ 1		$ 1		$ 1
Cost of goods sold	$ 99,117	$ 84,367	$ 283,670	$ 247,586
Property, plant and equipment gross	372,955		372,955		$ 352,010
Shipping and handling costs	7,600	6,000	19,500	17,200
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	1,600		1,600
Coffee Brewing Equipment
Property, Plant and Equipment
Cost of goods sold	9,500	7,000	23,100	19,900
Depreciation	2,100	$ 2,300	6,500	$ 6,900
Property, plant and equipment gross	8,100		8,100		$ 8,300
Retained Earnings | Accounting Standards Update 2017-12
Property, Plant and Equipment
Retained earnings adjustment	$ 300		$ 300