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Consolidated Statement 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
Non-controlling Interest
Beginning Balance at May. 31, 2013 $ 258,287 $ 5,773 $ 99,935 $ (1,372) $ 153,885 $ 66
Beginning Balance (in shares) at May. 31, 2013 36,084,021 36,084        
Issuance of shares of common stock under equity compensation plans, and share based compensation, including $2,107 of excess income tax benefit (in shares)   506        
Issuance of shares of common stock under equity compensation plans, and share based compensation, including $2,107 of excess income tax benefit 8,104 82 8,022      
Issuance of shares under employee stock purchase plan (in shares)   9        
Issuance of shares under employee stock purchase plan 283 1 282      
Comprehensive income:            
Net income (loss) for the six months ended November 30, 2013 13,924       14,045 (121)
Foreign currency translation adjustments 1,212     1,212    
Ending Balance at Nov. 30, 2013 $ 281,810 $ 5,856 $ 108,239 $ (160) $ 167,930 $ (55)
Ending Balance (in shares) at Nov. 30, 2013 36,598,767 36,599