Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands |
Mar. 28, 2015 |
Dec. 27, 2014 |
Dec. 28, 2013 |
| Property, plant and equipment, accumulated depreciation, depletion and amortization |
$ 297,187
|
$ 279,375
|
$ 212,382
|
| Intangible assets, accumulated amortization |
$ 3,623
|
$ 3,073
|
$ 2,193
|
| Common Class A [Member] |
|
|
|
| Common stock, par value |
$ 0.01
|
|
|
| Common stock, shares authorized |
1,000,000,000
|
|
|
| Common stock, shares issued |
26,584,738
|
|
|
| Common stock, shares outstanding |
26,584,738
|
|
|
| Common Class B [Member] |
|
|
|
| Common stock, par value |
$ 0.01
|
|
|
| Common stock, shares authorized |
250,000,000
|
|
|
| Common stock, shares issued |
69,007,297
|
|
|
| Common stock, shares outstanding |
69,007,297
|
|
|
| Class A Units [Member] |
|
|
|
| Capital Units, Authorized |
|
31,502
|
31,261
|
| Capital Units, Issued |
|
31,502
|
31,261
|
| Capital Units, Outstanding |
|
31,502
|
31,261
|
| Class B Units [Member] |
|
|
|
| Capital Units, Authorized |
|
2,607
|
1,220
|
| Capital Units, Issued |
|
2,607
|
1,220
|
| Capital Units, Outstanding |
|
2,607
|
1,220
|
| Class C Units [Member] |
|
|
|
| Capital Units, Authorized |
|
381
|
363
|
| Capital Units, Issued |
|
381
|
363
|
| Capital Units, Outstanding |
|
381
|
363
|
| Class D Units [Member] |
|
|
|
| Capital Units, Authorized |
|
9,478
|
9,889
|
| Capital Units, Issued |
|
9,478
|
9,889
|
| Capital Units, Outstanding |
|
9,478
|
9,889
|