Restructuring costs - Activity Related to the Restructuring Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	$ 4,869	$ 841
Restructuring costs	1,150	4,412	$ 1,671
Cash payments	(3,763)	(1,674)
Other	388	1,290
Restructuring reserve, period ending	2,644	4,869	841
Severance and Benefits
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	2,126	617
Restructuring costs	0	2,454
Cash payments	(2,123)	(945)
Other	(3)	0
Restructuring reserve, period ending	0	2,126	617
Facility Exit Costs and Asset Impairment
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	2,743	224
Restructuring costs	1,150	1,958	124
Cash payments	(1,640)	(729)
Other	391	1,290
Restructuring reserve, period ending	$ 2,644	$ 2,743	$ 224