| Report Element Information |
| Run date/time: 7/19/2011 5:09:14 PM |
| Report Element Attributes: |
| Prefix: | pattern |
| Standard label: | Report as Of March 2, 2011 [Member] |
| Documentation: | Report as Of March 2, 2011 [Member] |
| Balance type: | |
| Period type: | For Period (duration) |
| Report element type: | [Member] |
| Data type: | [Member] (nonnum:domainItemType) |
| ID: | pattern_ReportAsOfMarch22011Member |
| Name: | pattern:ReportAsOfMarch22011Member |
| Labels of Report Element |
| Role: | Label | Lang |
| Standard label (http://www.xbrl.org/2003/role/label) | Report as Of March 2, 2011 [Member] | en |