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Treasury Stock and Repurchase Program (Tables) | 9 Months Ended
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Jan. 31, 2013
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, 2012 (1)(2) |  |  | 103,619 |  |  | $ | 1,390 |  |  | $ | 13.41 |  |  | $ | - |
Purchases effected in open market during the quarters ended : |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
October 31, 2012 |  |  | 3,440 |  |  |  | 30 |  |  |  | 8.84 |  |  | $ | 2,970 |
January 31, 2013 |  |  | 12,890 |  |  |  | 117 |  |  |  | 9.11 |  |  | $ | 2,853 |
Balance as of January 31, 2013 |  |  | 119,949 |  |  | $ | 1,537 |  |  | $ | 12.81 |  |  |  |  |
(1) Includes the balance of 18,400 shares with a total average cost of $354,000 that were acquired prior to the repurchase program authorized in January 2011. (2) Includes the balance of 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.

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- Definition Tabular disclosure of an entity's treasury stock, including the average cost per share, carrying basis for each class of treasury stock, description of share repurchase program authorized by an entity's board of directors, the number of shares repurchased, the cost of the shares repurchased, the remaining maximum dollar value of shares available for repurchase under the program, the treatment of the purchase price in excess of the current market value, number of shares held for each class of treasury stock, and other information necessary to a fair presentation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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