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Earnings Per Common Share | 12 Months Ended
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Apr. 30, 2012
Earnings Per Common Share [Abstract] |
Earnings Per Common Share | 5. EARNINGS PER COMMON SHARE Computations for basic and diluted earnings per common share are presented below:
|  | Years ended April 30,
|  | 2012 |  | 2011 |  | 2010
Basic |  |  |  |  |  |
Net earnings | $ | 116,791 | $ | 94,623 | $ | 116,962
Weighted average shares outstanding-basic |  | 38,068,001 |  | 42,284,664 |  | 50,899,370
Basic earnings per common share | $ | 3.07 | $ | 2.24 | $ | 2.30
Diluted |  |  |  |  |  |
Net earnings | $ | 116,791 | $ | 94,623 | $ | 116,962
Weighted-average shares outstanding-basic |  | 38,068,001 |  | 42,284,664 |  | 50,899,370
Plus effect of stock options and restricted stock units |  | 323,703 |  | 281,913 |  | 153,803
Weighted-average shares outstanding-diluted |  | 38,391,704 |  | 42,566,577 |  | 51,053,173
Diluted earnings per common share | $ | 3.04 | $ | 2.22 | $ | 2.29
Options to purchase shares of common stock that were not included in the computation of diluted earnings per share, because their inclusion would have been antidilutive, were 439,000 for fiscal 2012 and 356,000 for fiscal 2010. All options were included for fiscal 2011.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=16381557&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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