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Note 5 - Net Income Per Common Share (Tables)

12 Months Ended

Apr. 30, 2014

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

		Years ended April 30,
		2014				2013				2012
Basic
Net income		$	134,514			$	110,625			$	116,791
Weighted average shares outstanding-basic			38,457,680				38,297,083				38,068,001
Basic earnings per common share		$	3.50			$	2.89			$	3.07
Diluted
Net income		$	134,514			$	110,625			$	116,791
Weighted-average shares outstanding-basic			38,457,680				38,297,083				38,068,001
Plus effect of stock options and restricted stock units			410,726				322,993				323,703
Weighted-average shares outstanding-diluted			38,868,406				38,620,076				38,391,704
Diluted earnings per common share		$	3.46			$	2.86			$	3.04

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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