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Nature of Business (Details)	Jun. 30, 2011 Instrument Acre
Nature of Business (Textual) [Abstract]
Area of the Company's campus in Phoenix, Arizona	110

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- Definition

Area of the Company's campus.

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Data Type:	us-types:areaItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Nature of business.

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Namespace Prefix:	lope
Data Type:	xbrli:stringItemType
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