Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012
Accounts receivable, allowance for doubtful accounts	$ 2,011	$ 1,536
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, shares issued	69,849,855	69,626,883
Treasury stock, shares	7,187,965	6,793,928