Assets Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 02, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accumulated other comprehensive loss	$ (48,478)	$ (39,067)
Total assets held for sale	25,916	23,193
Total liabilities held for sale	1,661	1,736
Hirschmann Jv [Member] | Discontinued Operations, Held-for-sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition, sales price	39,000	39,000
Accumulated other comprehensive loss	13,500	15,700
Receivables, net	4,730	4,551
Inventories, net	3,523	2,848
Other current assets	1,051	1,131
Property, plant, and equipment	2,063	1,946
Intangible assets	4,448	4,405
Goodwill	5,477	5,477
Other long-lived assets	28,555	26,766
Total assets of disposal group	49,847	47,124
Impairment of assets held for sale	(23,931)	(23,931)
Total assets held for sale	25,916	23,193
Accrued liabilities	1,288	1,288
Postretirement benefits	373	448
Total liabilities held for sale	$ 1,661	$ 1,736