Amortization on Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Acquired Finite And Infinite-Lived Intangible Assets [Line Items]
Amortization on intangible assets	$ 231	$ 275	$ 506	$ 550