Debt - Schedule of Debt (Detail) - USD ($) $ in Thousands |
Mar. 28, 2015 |
Dec. 27, 2014 |
Dec. 28, 2013 |
|---|---|---|---|
| Debt Instrument [Line Items] | |||
| Revolving credit facility | $ 26,000 | ||
| Long-term debt: | |||
| Long-term debt, total | $ 1,062,693 | $ 1,064,917 | 662,987 |
| Current portion of long-term debt | 5,275 | 4,220 | |
| Current portion of long-term debt | 5,275 | 5,275 | 30,220 |
| Long-term debt | 1,057,418 | 1,059,642 | 658,767 |
| Credit Facility [Member] | |||
| Long-term debt: | |||
| Long-term debt, total | 412,468 | 413,369 | 417,016 |
| Senior Notes [Member] | |||
| Long-term debt: | |||
| Long-term debt, total | $ 650,225 | $ 651,548 | $ 245,971 |