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Amortization on Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2012
Acquired Finite And Infinite-Lived Intangible Assets [Line Items]        
Amortization on intangible assets $ 194 $ 275 $ 701 $ 825