Segment Reporting Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Mobile connectivity | Mobile Comm Product Sales
Segment Reporting Information [Line Items]
Percent of consolidated net sales	21.00%	19.00%	21.00%
Mobile connectivity | VSAT Airtime Service Sales
Segment Reporting Information [Line Items]
Percent of consolidated net sales	51.00%	46.00%	50.00%	46.00%
Inertial navigation | FOG System Sales
Segment Reporting Information [Line Items]
Percent of consolidated net sales	16.00%	21.00%	15.00%	18.00%
Non-US
Segment Reporting Information [Line Items]
Percent of consolidated net sales	59.00%	55.00%	53.00%	54.00%
Singapore
Segment Reporting Information [Line Items]
Percent of consolidated net sales	10.00%