Valuation and Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at end of year	$ 5,633		$ 4,506
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	682		1,098		976
Charged to costs and expenses	211		172		257
Charged to other accounts
Deductions	6	[1]	588	[1]	135	[1]
Balance at end of year	$ 887		$ 682		$ 1,098

[1] Specific accounts written off as uncollectible.