Acquisitions - Narrative (Details) - USD ($) $ in Thousands					3 Months Ended	9 Months Ended
	Feb. 01, 2018	Jul. 03, 2017	Apr. 03, 2017	Nov. 04, 2016	Mar. 31, 2018	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2017
Business Acquisition [Line Items]
Acquisition of business, net of cash acquired						$ 185,396	$ 36,911
Estimated fair value of goodwill					$ 499,292	499,292		$ 380,846
Themis Computer Acquisition
Business Acquisition [Line Items]
Acquisition of business, net of cash acquired	$ 179,705
Estimated fair value of goodwill	114,517
Revenue of acquiree since acquisition date					9,501
Net income (loss) of acquiree since acquisition date					267
Cash paid at closing	187,089
Themis Computer Acquisition | Customer Relationships
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 53,420
Useful life of acquired assets	12 years 6 months
Themis Computer Acquisition | Developed Technology Rights
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 17,150
Useful life of acquired assets	9 years 6 months
Themis Computer Acquisition | Backlog
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 2,300
Useful life of acquired assets	1 year
RTL
Business Acquisition [Line Items]
Total purchase price		$ 5,798
Delta
Business Acquisition [Line Items]
Acquisition of business, net of cash acquired			$ 40,500
Total purchase price			40,500
Estimated fair value of goodwill			18,151
Tax deductible goodwill					$ 17,298	$ 17,298
Cash paid at closing			40,500
Delta | Customer Relationships
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			$ 8,000
Useful life of acquired assets			9 years
Delta | Developed Technology Rights
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			$ 5,900
Useful life of acquired assets			7 years
Delta | Backlog
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			$ 3,100
Useful life of acquired assets			2 years
CES Creative Electronic Systems S.A.
Business Acquisition [Line Items]
Acquisition of business, net of cash acquired				$ 38,793
Estimated fair value of goodwill				20,637
Cash paid at closing				39,123
CES Creative Electronic Systems S.A. | Customer Relationships
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired				$ 9,060
Useful life of acquired assets				9 years
CES Creative Electronic Systems S.A. | Developed Technology Rights
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired				$ 5,662
Useful life of acquired assets				7 years