Goodwill (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The carrying amounts of our goodwill, all in our Electronic Systems segment, were as follows:

	(In thousands)
Gross goodwill	$	199,157
Accumulated goodwill impairment	(81,722		)
Balance at December 31, 2017	$	117,435
Balance at March 31, 2018	$	117,435