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Treasury Stock and Repurchase Program (Tables)
 3 Months Ended
Jul. 31, 2015
Treasury Stock [Abstract]  
Schedule of treasury stock, at cost
                                 
(in thousands except for shares and cost per share)   Shares     Total Average Cost Assigned     Average Cost per Share     Aggregate Purchase Price
Remaining Under the
Program		  
Balance as of April 30, 2015 (1)(2)     190,504     $ 2,244     $ 11.78     $ 2,146  
Purchases effected in open market during the months ended:                                
May 31, 2015 (2)     4,989     $ 70     $ 13.99     $ 2,076  
June 30, 2015 (2)     1,246     $ 16     $ 12.75     $ 2,060  
July 31, 2015 (2)     6,002     $ 80     $ 13.41     $ 1,980  
Balance as of July 31, 2015     202,741     $ 2,410     $ 11.89     $ 1,980  

 

(1) Includes 85,219 shares with a total average cost of $1,036,000 that were acquired during the former repurchase program, which was authorized in January 2011 and expired in January 2012; 18,400 shares were acquired prior to the repurchase program authorized in January 2011.

 

(2) Were acquired during the $3 million repurchase program authorized in September 2012.