Acquisitions - Summary of Fair Value of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 27, 2014 |
Dec. 28, 2013 |
Dec. 29, 2012 |
|
| Business Acquisition [Line Items] | |||
| Acquired intangible assets weighted average life | 18 years | ||
| Aggregate reserves | $ 5.9 | ||
| Reserve Rights [Member] | |||
| Business Acquisition [Line Items] | |||
| Acquired intangible assets weighted average life | 20 years | ||
| Leases [Member] | |||
| Business Acquisition [Line Items] | |||
| Acquired intangible assets weighted average life | 11 years | ||