Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012	Jun. 30, 2011
Accounts receivable, allowance for doubtful accounts	$ 1,536	$ 766
Preferred stock, par value	$ 0	$ 0
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common Stock, par value	$ 0	$ 0
Common Stock, shares authorized	300,000,000	300,000,000
Common Stock, issued shares	69,626,883	69,077,492
Treasury stock, shares	6,793,928	6,393,659