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Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Jul. 04, 2021 | Jan. 29, 2021 | Dec. 31, 2020
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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] |  |  |
Goodwill | $ 1,286,617 |  | $ 1,251,938
OTN Systems N.V. |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] |  |  |
Receivables |  | $ 5,036 |
Inventories |  | 10,700 |
Other current assets |  | 1,361 |
Property, plant and equipment |  | 602 |
Intangible assets |  | 39,930 |
Goodwill |  | 39,550 |
Operating lease right-of-use assets |  | 4,144 |
Other long-lived assets |  | 706 |
Total assets acquired |  | 102,029 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] |  |  |
Accounts payable |  | 5,931 |
Accrued liabilities |  | 4,486 |
Deferred revenues |  | 3,260 |
Long-term debt |  | 1,841 |
Post retirement benefits |  | 3,581 |
Deferred income taxes |  | 5,522 |
Long-term operating lease liabilities |  | 3,271 |
Other long-term liabilities |  | 771 |
Total liabilities assumed |  | 28,663 |
Net assets |  | 73,366 |
Noncontrolling interests |  | 20 |
Net assets attributable to Belden |  | $ 73,346 |

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- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
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- Definition Amount of deferred revenue expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
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