Income taxes - Components of Provision for Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Current income taxes
Federal	$ (7,506)	$ 2,823	$ 14,476
State	(397)	176	(2,214)
Foreign	555	487	214
Total current income taxes	(7,348)	3,486	12,476
Deferred income taxes
Federal	3,205	(2,315)	1,045
State	128	(78)	38
Total deferred income taxes	3,333	(2,393)	1,083
Provision (benefit) for income taxes from continuing operations	(4,015)	1,093	13,559
Provision for income taxes from discontinued operations	0	4,226	347
Total provision (benefit) for income taxes	$ (4,015)	$ 5,319	$ 13,906