Income Taxes - Components of Net Deferred Income Tax Liability (Detail) - USD ($) $ in Thousands |
Mar. 28, 2015 |
Dec. 27, 2014 |
Dec. 28, 2013 |
|---|---|---|---|
| Deferred tax (liabilities) assets: | |||
| Accelerated depreciation | $ (40,141) | $ (33,146) | |
| Mining reclamation reserve | 2,180 | 1,502 | |
| Net operating loss | 7,106 | 2,227 | |
| Capital losses on securities | 997 | ||
| Net intangible assets | (1,072) | (607) | |
| Inventory purchase accounting adjustments | 1,275 | 1,288 | |
| Working capital (e.g., accrued compensation, prepaid assets) | (10) | 1,655 | |
| Deferred tax liabilities, net | (30,662) | (26,084) | |
| Less valuation allowance on loss carryforwards | $ (69,000) | (2,523) | (1,826) |
| Total | (33,185) | (27,910) | |
| Other current assets | 1,167 | 2,316 | |
| Other noncurrent liabilities | (34,352) | (30,226) | |
| Total | $ (33,185) | $ (27,910) |