Valuation and Qualifying Accounts (Detail) - Allowance for Doubtful Accounts - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year		$ 517	$ 1,294	$ 887
Charged to costs and expenses		$ 484	$ 8	$ 409
Charged to other accounts
Deductions	[1]	$ 310	$ 785	$ 2
Balance at end of year		$ 691	$ 517	$ 1,294

[1] Specific accounts written off as uncollectible.