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Operating Segments and Geographic Information - Additional Information (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 USD ($) | Sep. 29, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jul. 01, 2018 USD ($) | Apr. 01, 2018 USD ($) | Dec. 31, 2019 USD ($) Segment | Dec. 31, 2019 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 USD ($) segment | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments |  |  |  |  |  |  |  |  | 2 |  |  | 2 |  |
Revenues | $ 549,688 | $ 533,098 | $ 548,352 | $ 500,140 | $ 552,052 | $ 554,037 | $ 560,898 | $ 498,715 |  | $ 2,131,278 |  |  | $ 2,165,702 | $ 2,087,185
Anixter International Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 285,000 |  |  | $ 309,000 | $ 292,200
Accounts receivable outstanding | $ 10,200 |  |  |  |  |  |  |  | $ 10,200 | $ 10,200 | $ 10,200 | $ 10,200 |  |
Anixter International Inc. | Customer Concentration Risk |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of total accounts receivable outstanding | 3.00% |  |  |  |  |  |  |  | 3.00% | 3.00% | 3.00% | 3.00% |  |
Anixter International Inc. | Customer Concentration Risk | Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of total revenues |  |  |  |  |  |  |  |  |  |  | 13.00% |  | 14.00% | 14.00%
Anixter International Inc and WESCO |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | $ 328,200 |  |  | $ 361,700 | $ 342,800
Anixter International Inc and WESCO | Customer Concentration Risk | Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of total revenues |  |  |  |  |  |  |  |  |  |  | 15.00% |  | 17.00% | 16.00%

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