| Report Element Information |
| Run date/time: 7/19/2011 1:22:49 PM |
| Report Element Attributes: |
| Prefix: | pattern |
| Standard label: | Prior Period Adjustments, Period Increase (Decrease), Total |
| Documentation: | Prior Period Adjustments |
| Balance type: | Credit |
| Period type: | As of (instant) |
| Report element type: | [Concept] |
| Data type: | Monetary (xbrli:monetaryItemType) |
| ID: | pattern_PriorPeriodAdjustments |
| Name: | pattern:PriorPeriodAdjustments |
| Labels of Report Element |
| Role: | Label | Lang |
| Standard label (http://www.xbrl.org/2003/role/label) | Prior Period Adjustments | en |
| Total label (http://www.xbrl.org/2003/role/totalLabel) | Prior Period Adjustments, Period Increase (Decrease), Total | en |