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Property and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Jun. 30, 2011
Cost:    
Land $ 7,473 $ 7,497
Buildings and improvements 123,257 119,833
Laboratory equipment 31,658 30,315
Office and computer equipment 5,710 5,407
Property, Plant and Equipment, Gross, Total 168,098 163,052
Accumulated depreciation and amortization (74,310) (67,654)
Property and equipment, net $ 93,788 $ 95,398