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Acquisitions - Unaudited Pro Forma Results of Operations (Detail) - BTI Acquisition - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
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Jan. 31, 2015 | Jan. 31, 2015
Business Acquisition [Line Items] |  |
Net sales | $ 136,573 | $ 401,884
Net income | $ 8,620 | $ 26,064
Net income per share - diluted | $ 0.16 | $ 0.47

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- Definition The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
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