Acquisition-Related Liabilities - Additional Information (Detail) |
12 Months Ended |
|---|---|
Dec. 27, 2014 | |
| Minimum [Member] | |
| Business Acquisition [Line Items] | |
| Period identified for deferred consideration due | 5 years |
| Maximum [Member] | |
| Business Acquisition [Line Items] | |
| Period identified for deferred consideration due | 20 years |