XML 50 R40.htm IDEA: XBRL DOCUMENT v2.4.0.8

Nature of Business - Additional Information (Detail)	Dec. 31, 2013 acre
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Area of the company's campus in Phoenix, Arizona	133

X

- Definition

Area of the company's campus.

+ References

No definition available.

+ Details

Name:	lope_AreaOfCompanysCampus
Namespace Prefix:	lope_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

X

- Details

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