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Segment Information (Details) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 02, 2016 USD ($) | Apr. 02, 2016 Segment | Jun. 27, 2015 USD ($) | Jul. 02, 2016 USD ($) | Jun. 27, 2015 USD ($) | Dec. 26, 2015 USD ($) Segment
Segment Information [Abstract] |  |  |  |  |  |
Number of reportable segments | Segment |  | 3 |  |  |  | 2
Summary of segment information [Abstract] |  |  |  |  |  |
Net sales | $ 544,071 |  | $ 555,593 | $ 1,076,880 | $ 1,092,835 |
Cost of goods sold | 456,060 |  | 470,365 | 902,702 | 931,199 |
Depreciation and amortization | 9,061 |  | 8,188 | 17,981 | 16,041 |
Selling, general, and administrative expense | 34,514 |  | 33,420 | 70,294 | 66,251 |
Gain on sale of assets | 0 |  | (15,376) | 0 | (15,376) |
Severance | 0 |  | 3,442 | 0 | 3,442 |
Operating income | 44,436 |  | 55,554 | 85,903 | 91,278 |
Interest expense | (1,692) |  | (2,219) | (3,540) | (4,295) |
Other income, net | 515 |  | 265 | 760 | 370 |
Income before income taxes | 43,259 |  | 53,600 | 83,123 | 87,353 |
Segment assets | 1,420,475 |  |  | 1,420,475 |  | $ 1,338,801
Piping Systems [Member] |  |  |  |  |  |
Summary of segment information [Abstract] |  |  |  |  |  |
Segment assets | 863,138 |  |  | 863,138 |  | 811,343
Industrial Metals [Member] |  |  |  |  |  |
Summary of segment information [Abstract] |  |  |  |  |  |
Segment assets | 160,655 |  |  | 160,655 |  | 153,102
Climate [Member] |  |  |  |  |  |
Summary of segment information [Abstract] |  |  |  |  |  |
Segment assets | 66,383 |  |  | 66,383 |  | 61,672
General Corporate [Member] |  |  |  |  |  |
Summary of segment information [Abstract] |  |  |  |  |  |
Segment assets | 330,299 |  |  | 330,299 |  | $ 312,684
Operating Segments [Member] | Piping Systems [Member] |  |  |  |  |  |
Summary of segment information [Abstract] |  |  |  |  |  |
Net sales | 388,662 |  | 379,750 | 757,552 | 741,232 |
Cost of goods sold | 333,356 |  | 326,338 | 647,148 | 639,028 |
Depreciation and amortization | 5,787 |  | 5,335 | 11,436 | 10,522 |
Selling, general, and administrative expense | 16,560 |  | 16,776 | 34,850 | 34,122 |
Gain on sale of assets |  |  | (15,376) |  | (15,376) |
Severance |  |  | 3,442 |  | 3,442 |
Operating income | 32,959 |  | 43,235 | 64,118 | 69,494 |
Operating Segments [Member] | Industrial Metals [Member] |  |  |  |  |  |
Summary of segment information [Abstract] |  |  |  |  |  |
Net sales | 127,737 |  | 145,228 | 262,258 | 296,264 |
Cost of goods sold | 104,874 |  | 120,808 | 214,103 | 248,532 |
Depreciation and amortization | 2,120 |  | 1,643 | 4,255 | 3,298 |
Selling, general, and administrative expense | 3,619 |  | 2,302 | 6,864 | 5,000 |
Gain on sale of assets |  |  | 0 |  | 0 |
Severance |  |  | 0 |  | 0 |
Operating income | 17,124 |  | 20,475 | 37,036 | 39,434 |
Operating Segments [Member] | Climate [Member] |  |  |  |  |  |
Summary of segment information [Abstract] |  |  |  |  |  |
Net sales | 31,359 |  | 31,498 | 62,065 | 57,309 |
Cost of goods sold | 22,448 |  | 24,134 | 46,153 | 45,401 |
Depreciation and amortization | 618 |  | 614 | 1,217 | 1,039 |
Selling, general, and administrative expense | 2,456 |  | 2,500 | 4,979 | 4,354 |
Gain on sale of assets |  |  | 0 |  | 0 |
Severance |  |  | 0 |  | 0 |
Operating income | 5,837 |  | 4,250 | 9,716 | 6,515 |
Corporate and Eliminations [Member] |  |  |  |  |  |
Summary of segment information [Abstract] |  |  |  |  |  |
Net sales | (3,687) |  | (883) | (4,995) | (1,970) |
Cost of goods sold | (4,618) |  | (915) | (4,702) | (1,762) |
Depreciation and amortization | 536 |  | 596 | 1,073 | 1,182 |
Selling, general, and administrative expense | 11,879 |  | 11,842 | 23,601 | 22,775 |
Gain on sale of assets |  |  | 0 |  | 0 |
Severance |  |  | 0 |  | 0 |
Operating income | $ (11,484) |  | $ (12,406) | $ (24,967) | $ (24,165) |

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