Goodwill	6 Months Ended
Jul. 02, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill Gross goodwill and accumulated goodwill impairment were $164.3 million and $81.7 million, respectively, both as of July 2, 2016 and December 31, 2015. The goodwill is related to the Electronic Systems segment. Certain factors may result in the need to perform an impairment test prior to the fourth quarter, which is when we perform our annual goodwill impairment test, including significant under performance of our business relative to expected operating results, significant adverse economic and industry trends, significant decline in our market capitalization for an extended period of time relative to net book value, a decision to divest individual businesses within a reporting unit, or a decision to group individual businesses differently. At times, our market capitalization had declined below book value, which if it continues for an extended period of time, is a factor that could lead to a conclusion that a triggering event has occurred. As our market capitalization declines recently have been temporary in nature and our market capitalization has exceeded our book value, we do not consider these temporary declines in market capitalization to be a triggering event in the fiscal quarter ended July 2, 2016. However, it is considered at least reasonably possible that our determination that goodwill for our Electronic Systems segment was not impaired could change in the near term if any the factors noted above occurs.

Goodwill

Gross goodwill and accumulated goodwill impairment were $164.3 million and $81.7 million, respectively, both as of July 2, 2016 and December 31, 2015. The goodwill is related to the Electronic Systems segment.

Certain factors may result in the need to perform an impairment test prior to the fourth quarter, which is when we perform our annual goodwill impairment test, including significant under performance of our business relative to expected operating results, significant adverse economic and industry trends, significant decline in our market capitalization for an extended period of time relative to net book value, a decision to divest individual businesses within a reporting unit, or a decision to group individual businesses differently. At times, our market capitalization had declined below book value, which if it continues for an extended period of time, is a factor that could lead to a conclusion that a triggering event has occurred. As our market capitalization declines recently have been temporary in nature and our market capitalization has exceeded our book value, we do not consider these temporary declines in market capitalization to be a triggering event in the fiscal quarter ended July 2, 2016. However, it is considered at least reasonably possible that our determination that goodwill for our Electronic Systems segment was not impaired could change in the near term if any the factors noted above occurs.