XML 41 R97.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Business Segments And Geographical Information (Details 6) (U S Federal Government) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Jan. 02, 2011 | Jan. 03, 2010
U S Federal Government |  |  |
Business Concentration |  |  |
Percentage of revenue | 47.00% | 40.00% | 35.00%

X
- Details
Name: | geo_BusinessConcentrationAbstract
Namespace Prefix: | geo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of revenue. + References No definition available. + Details
Name: | geo_PercentageOfRevenue
Namespace Prefix: | geo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration