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Acquisitions - Schedule of Pro Forma Information (Details) - Thinklogical Holdings LLC - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
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Jul. 02, 2017 | Jul. 03, 2016 | Jul. 02, 2017 | Jul. 03, 2016
Business Acquisition [Line Items] |  |  |  |
Revenues | $ 615,109 | $ 608,517 | $ 1,170,745 | $ 1,155,428
Net income attributable to Belden common stockholders | $ 28,250 | $ 38,194 | $ 41,130 | $ 47,520
Diluted income per share attributable to Belden common stockholders (in usd per share) | $ 0.66 | $ 0.90 | $ 0.96 | $ 1.12

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