Impairment of Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended
	Dec. 06, 2012	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Impairment Charges [Line Items]
Impairment of property, plant and equipment		$ 0	$ 0	$ 789	$ 0
Number days taken for acquisition	90 days
Acquisition price	1,500
Impairment Charge			$ 931