Operating Segment, Geographic Information and Platform - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 01, 2021	Dec. 27, 2019	Jan. 01, 2021	Dec. 27, 2019
Revenue from External Customer [Line Items]
Net revenues	$ 210,676	$ 193,913	$ 416,297	$ 371,217
Airborne [Member]
Revenue from External Customer [Line Items]
Net revenues	91,662	106,301	178,911	192,458
Land [Member]
Revenue from External Customer [Line Items]
Net revenues	58,004	24,132	95,555	40,442
Naval [Member]
Revenue from External Customer [Line Items]
Net revenues	36,559	32,441	82,841	72,151
Product and Service, Other [Member]
Revenue from External Customer [Line Items]
Net revenues	$ 24,451	$ 31,039	$ 58,990	$ 66,166