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v3.19.1

Revenue Recognition (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 30, 2019 USD ($) day | Mar. 31, 2018 USD ($)
Disaggregation of Revenue [Line Items] |  |
Standard terms of payment, number of days | day | 10 |
Net sales | $ 638,701 | $ 437,487
Warehouse |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 504,274 | 333,306
Direct |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 123,404 | 82,942
Reload and service revenue |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 18,905 | 28,270
Customer discounts and rebates |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | (7,882) | (7,031)
Structural products |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 197,492 | 176,481
Specialty products |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 437,672 | 258,589
Other | Other |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | $ 3,537 | $ 2,417

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