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, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Concentration risk, percentage	49.00%	16.00%	43.00%	16.00%
Patriot Program [Member] | Program Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	20.00%		19.00%
F-35 Program [Member] | Program Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	16.00%		13.00%
Aegis Program [Member] | Program Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration risk, percentage	13.00%	16.00%	11.00%	16.00%