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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Mar. 31, 2012 | Jun. 30, 2011
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Statement of Financial Position [Abstract] |  |
Accounts receivable, allowance for doubtful accounts | $ 2,758 | $ 1,280
Preferred stock, par value | $ 0.01 | $ 0.01
Preferred stock, shares authorized | 5,000,000 | 5,000,000
Preferred stock, shares issued | 0 | 0
Common stock, par value | $ 0.01 | $ 0.01
Common stock, shares authorized | 100,000,000 | 100,000,000
Common stock, shares issued | 45,920,013 | 45,045,097
Treasury stock, shares | 1,202,612 | 1,144,610

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