Operating Segment, Geographic Information and Significant Customers - Geographic Distribution of Revenues and Long Lived Assets from Continuing Operations (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 02, 2021 USD ($)	Mar. 27, 2020 USD ($)	Apr. 02, 2021 USD ($) segment	Mar. 27, 2020 USD ($)	Jul. 03, 2020 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			1
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ 256,857	$ 208,016	$ 673,154	$ 579,233
Identifiable long-lived assets	128,343		128,343		$ 87,737
Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	40,355	56,786	131,330	170,515
Modules and Sub-assemblies
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	21,749	25,805	74,208	90,569
Integrated Subsystems
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	194,753	125,425	467,616	318,149
Total Sensor & Effector
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	132,515	141,880	402,344	354,725
Radar
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	81,481	78,113	238,650	164,360
Electronic Warfare
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	25,782	37,488	91,342	109,684
Other Sensor & Effector
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	25,252	26,279	72,352	80,681
C4I
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	107,144	47,351	219,284	154,140
Other End Applications
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	17,198	18,785	51,526	70,368
Domestic
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	217,255	187,560	577,093	516,659
International/Foreign Military Sales
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	39,602	20,456	96,061	62,574
US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	246,231	196,158	639,851	539,535
Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	10,482	11,408	32,957	37,569
Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	144	450	346	2,129
Reportable Geographical Components | US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	246,282	196,547	640,778	541,550
Identifiable long-lived assets	122,461		122,461		82,588
Reportable Geographical Components | Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	11,216	12,162	34,599	39,791
Identifiable long-lived assets	5,876		5,876		5,144
Reportable Geographical Components | Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	144	450	346	2,129
Identifiable long-lived assets	6		6		5
Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(785)	(1,143)	(2,569)	(4,237)
Identifiable long-lived assets	0		0		$ 0
Geography Eliminations | US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	51	389	927	2,015
Geography Eliminations | Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	734	754	1,642	2,222
Geography Eliminations | Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ 0	$ 0	$ 0	$ 0