Earnings Per Share - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended								12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2013 Warrants	Jun. 30, 2012 Warrants	Jun. 30, 2004 Warrants 2003	Jun. 30, 2013 Warrants 2009	Jun. 30, 2009 Warrants 2009	Jun. 30, 2013 Warrants 2009 If the number of underlying shares will not be less than 375,000 shares
Computation Of Earnings Per Share Line Items
Grant of warrants to purchase common shares						375,000	450,000	500,000
Value of common shares granted for warrants						$ 3.9
Warrants exercise price						23.36		30.03
Anti-dilutive common stock equivalents, warrants to purchase common stock	5,700,000	5,600,000	2,200,000	450,000	475,000
Number of warrant shares , decrease									25,000