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Consolidated Statements of Equity (USD $)
In Thousands, except Share data, unless otherwise specified
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Noncontrolling Interest
Beginning Balance at May. 31, 2013 $ 258,287 $ 3,849 $ 101,859 $ (1,372) $ 153,885 $ 66
Beginning Balance (in shares) at May. 31, 2013 24,056,014 24,056        
Issuance of shares of common stock under equity compensation plans, and share based compensation, including $1,585 of excess income tax benefit (in shares)   179        
Issuance of shares of common stock under equity compensation plans, and share based compensation, including $1,585 of excess income tax benefit 4,125 28 4,097      
Issuance of shares under employee stock purchase plan (in shares)   6        
Issuance of shares under employee stock purchase plan 283 1 282      
Comprehensive income:            
Net income (loss) for the three months ended August 31, 2013 7,697       7,839 (142)
Foreign currency translation adjustments 330     330    
Ending Balance at Aug. 31, 2013 $ 270,722 $ 3,878 $ 106,238 $ (1,042) $ 161,724 $ (76)
Ending Balance (in shares) at Aug. 31, 2013 24,240,625 24,241