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Consolidated Statement of Changes in Stockholders' Equity - 3 months ended Jul. 31, 2015 - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive (Loss)/Income
Treasury Stock
Balance at Apr. 30, 2015 $ 194,370 $ 70 $ 219,198 $ 147,352 $ 73 $ (172,323)
Balance (in shares) at Apr. 30, 2015 69,625,081 69,625,000       15,563,000
Proceeds from exercise of employee stock options $ 634   634      
Proceeds from exercise of employee stock options (in shares) 132,599 133,000        
Repurchase of common stock (in shares) 0          
Stock-based compensation $ 1,545   1,545      
Excess tax benefit for stock-based compensation 814   814      
Fair market value adjustment of interest rate swap, net of tax effect (116)       (116)  
Issuance of common stock under restricted stock unit awards, net of shares surrendered (1,661)   (1,661)      
Issuance of common stock under restricted stock unit awards, net of shares surrendered (in shares)   173,000        
Net income 14,412     14,412    
Balance at Jul. 31, 2015 $ 209,998 $ 70 $ 220,530 $ 161,764 $ (43) $ (172,323)
Balance (in shares) at Jul. 31, 2015 69,931,033 69,931,000       15,563,000