Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018	Jun. 30, 2017
Property, Plant and Equipment
% of total	100.00%	100.00%	100.00%	100.00%
Cost of goods sold	$ 106,529	$ 111,089	$ 205,734	$ 196,719
Selling expenses	39,591	42,127	76,901	74,984
Coffee Brewing Equipment
Property, Plant and Equipment
Cost of goods sold	8,400	7,100	16,900	13,500
Interest Expense [Member] | Accounting Standards Update 2017-07
Property, Plant and Equipment
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	1,600	1,600	3,300	3,300	$ 6,600	$ 6,400
Other Expense [Member] | Accounting Standards Update 2017-07
Property, Plant and Equipment
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	1,800	1,700	3,500	3,300	$ (6,700)	$ (6,800)
Shipping and Handling [Member]
Property, Plant and Equipment
Selling expenses	$ 3,500	$ 3,300	$ 6,600	$ 5,100
Five Customers [Member]
Property, Plant and Equipment
% of total			29.00%		20.00%