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Assets Held for Sale - Summary of Major Assets and Liabilities Classified as held for Sale (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2016 | Oct. 01, 2017 | Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Total assets held for sale | $ 23,193 | $ 35,953 | $ 23,193
Total liabilities held for sale | 1,736 | 1,732 | 1,736
Discontinued Operations, Held-for-sale | Hirschmann Jv |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Receivables, net | 4,551 | 5,937 | 4,551
Inventories, net | 2,848 | 4,302 | 2,848
Other current assets | 1,131 | 1,101 | 1,131
Property, plant, and equipment, less accumulated depreciation | 1,946 | 2,348 | 1,946
Intangible assets, less accumulated amortization | 4,405 | 4,589 | 4,405
Goodwill | 5,477 | 5,477 | 5,477
Other long-lived assets | 26,766 | 36,130 | 26,766
Total assets of disposal group | 47,124 | 59,884 | 47,124
Impairment of assets held for sale | (23,900) | (23,931) | (23,931)
Total assets held for sale | 23,193 | 35,953 | 23,193
Accrued liabilities | 1,288 | 1,325 | 1,288
Postretirement benefits | 448 | 407 | 448
Total liabilities held for sale | $ 1,736 | $ 1,732 | $ 1,736

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- Definition Amount of assets held-for-sale that are not part of a disposal group. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 15 -Paragraph 4 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=77912953&loc=d3e400-110220 + Details
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- Definition Amount classified as intangible assets, excluding goodwill, attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721533-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2473-110228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e1107-107759 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2941-110230 + Details
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