Operating Segment, Geographic Information and Significant Customers - Net Revenue by Platform (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jul. 03, 2020	Mar. 27, 2020	Dec. 27, 2019	Sep. 27, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jul. 03, 2020	Jun. 30, 2019	Jun. 30, 2018
Revenue from External Customer [Line Items]
Net revenues	$ 217,377	$ 208,016	$ 193,913	$ 177,304	$ 176,963	$ 174,636	$ 159,089	$ 144,056	$ 796,610	$ 654,744	$ 493,184
Airborne
Revenue from External Customer [Line Items]
Net revenues									402,670	306,412	242,611
Land
Revenue from External Customer [Line Items]
Net revenues									102,956	83,034	41,841
Naval
Revenue from External Customer [Line Items]
Net revenues									157,225	136,966	110,620
Other
Revenue from External Customer [Line Items]
Net revenues									$ 133,759	$ 128,332	$ 98,112