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Net Income Per Common Share | 12 Months Ended
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Apr. 30, 2013
Net Income Per Common Share [Abstract] |
Net Income Per Common Share | 5.NET INCOME PER COMMON SHARE Computations for basic and diluted earnings per common share are presented below:
|  | Years ended April 30,
|  | 2013 |  | 2012 |  | 2011
Basic |  |  |  |  |  |
Net income | $ | 110,625 | $ | 116,791 | $ | 94,623
Weighted average shares outstanding-basic |  | 38,297,083 |  | 38,068,001 |  | 42,284,664
Basic earnings per common share | $ | 2.89 | $ | 3.07 | $ | 2.24
Diluted |  |  |  |  |  |
Net income | $ | 110,625 | $ | 116,791 | $ | 94,623
Weighted-average shares outstanding-basic |  | 38,297,083 |  | 38,068,001 |  | 42,284,664
Plus effect of stock options and restricted stock units |  | 322,993 |  | 323,703 |  | 281,913
Weighted-average shares outstanding-diluted |  | 38,620,076 |  | 38,391,704 |  | 42,566,577
Diluted earnings per common share | $ | 2.86 | $ | 3.04 | $ | 2.22
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. All options were included for fiscal 2013 and 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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