Operating Segment, Geographic Information and Significant Customers - Programs Comprising Ten Percent or more of Company's Revenue (Detail) - Sales Revenue, Net [Member]	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015 Rate	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Concentration risk, percentage	12.00%	49.00%	23.00%	43.00%
SEWIP Program [Member] | Program Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	12.00%		12.00%
F-35 Program [Member] | Program Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage		16.00%		13.00%
Patriot Program [Member] | Program Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage		20.00%	11.00%	19.00%
Aegis Program [Member] | Program Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage		13.00%		11.00%