Leases (Narrative)(Details) |
12 Months Ended |
|---|---|
Dec. 27, 2015 | |
| Minimum [Member] | |
| Operating Leased Assets [Line Items] | |
| Initial lease term | 10 years |
| Lease expiration date | 2016 |
| Lease terms renewal | 3 years |
| Maximum [Member] | |
| Operating Leased Assets [Line Items] | |
| Initial lease term | 20 years |
| Lease expiration date | 2034 |
| Lease terms renewal | 20 years |