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
	Sep. 30, 2015	Sep. 30, 2014 Rate
Segment Reporting Information [Line Items]
Concentration risk, percentage	17.00%	57.00%
Patriot Program [Member] | Program Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	17.00%	18.00%
SEWIP Program [Member] | Program Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage		18.00%
F-35 Program [Member] | Program Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage		10.00%
Aegis Program [Member] | Program Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage		11.00%