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Note 3 - Acquisitions (Tables)

12 Months Ended

Apr. 30, 2014

Business Combinations [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

Assets acquired:
Inventories		$	1,622
Property and equipment			24,469
Total assets			26,091
Liabilities assumed:
Accrued expenses			122
Total liabilities			122
Net tangible assets acquired			25,969
Goodwill			5,615
Total consideration paid		$	31,584

Business Acquisition, Pro Forma Information [Table Text Block]

		Years Ended April 30,
		2014				2013
Total revenue		$	7,885,634			$	7,362,816
Net income		$	127,615			$	105,699
Net income per common share
Basic		$	3.32			$	2.76
Diluted		$	3.28			$	2.73

X

- Definition

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

+ 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=25497992&loc=d3e1392-128463

+ Details

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X

- Details

Name:	us-gaap_BusinessCombinationsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

+ Details

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