Business realignment and acquisition integration charges - Income statement location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Cost of sales
Restructuring Cost and Reserve [Line Items]
Realignment charges and acquisition integration costs	$ 7,679	$ 3,669	$ 11,024	$ 8,068
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Realignment charges and acquisition integration costs	2,157	3,713	3,535	7,872
Other (income), net
Restructuring Cost and Reserve [Line Items]
Realignment charges and acquisition integration costs	$ 0	$ 220	$ 0	$ 275