Business Segment Information Business Segment Information (Details Textuals)	12 Months Ended
Dec. 31, 2013 segments
Business Segment Information [Abstract]
Number Of Business Segments (in segments)	3
Maximum Delivered Cost On Fresh Dough Based On Retail Value Of End Product (as a percent)	27.00%

Maximum delivered cost of fresh dough based on the retail value of the end product.

No definition available.

Name:	pnra_MaximumDeliveredCostOnFreshDoughBasedOnRetailValueOfEndProduct
Namespace Prefix:	pnra_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration