Employee Long Term Incentive Plan - Weighted Average Assumptions Used to Estimate the Fair Value of Grants (Detail) |
12 Months Ended | ||
|---|---|---|---|
Dec. 27, 2014 |
Dec. 28, 2013 |
Dec. 29, 2012 |
|
| Class D Units | |||
| Dividend yield | 0.00% | ||
| Class D Units [Member] | |||
| Class D Units | |||
| Risk-free interest rate, Minimum | 0.50% | ||
| Risk-free interest rate | 0.50% | 1.62% | |
| Risk-free interest rate, Maximum | 0.68% | ||
| Dividend yield | 0.00% | ||
| Volatility | 58.00% | 58.00% | 47.00% |
| Expected term | 4 years | ||
| Class D Units [Member] | Minimum [Member] | |||
| Class D Units | |||
| Expected term | 3 years | 6 years | |
| Class D Units [Member] | Maximum [Member] | |||
| Class D Units | |||
| Expected term | 4 years | 8 years | |