Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017
Property, Plant and Equipment
Preferred stock, par value (in US$ per share)	$ 1		$ 1		$ 1
Cost of goods sold	$ 101,847	$ 83,929	$ 184,553	$ 163,219
Property, plant and equipment gross	364,370		364,370		$ 352,010
Shipping and handling costs	6,900	6,400	12,100	11,200
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	7,100	5,800	13,500	12,300
Depreciation	2,300	$ 2,100	4,400	$ 4,500
Property, plant and equipment gross	4,800		4,800		$ 5,900
Retained Earnings | Accounting Standards Update 2017-12
Property, Plant and Equipment
Retained earnings adjustment	$ 300		$ 300