Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2012	Jun. 30, 2011
Consolidated Balance Sheets [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	33,705,412	33,452,687
Treasury stock, shares at cost	4,353,200	4,353,200