GECO Avionics, LLC [Disclosure] Acquisition (Details) - USD ($) $ in Thousands			3 Months Ended	9 Months Ended
	Jan. 29, 2019	Jul. 31, 2018	Mar. 31, 2019	Mar. 31, 2019	Jan. 31, 2019	Jun. 30, 2018
Business Acquisition [Line Items]
Goodwill			$ 543,515	$ 543,515		$ 497,442
GECO Avionics, LLC
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 36,500
Goodwill					$ 22,823
Business Acquisition, Goodwill, Expected Tax Deductible Amount			22,823	22,823
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			2,477
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			333
Germane Systems
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		$ 47,166
Goodwill		$ 23,111
Business Acquisition, Goodwill, Expected Tax Deductible Amount			22,402	22,402
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			12,707	34,756
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			$ 1,159	$ 2,065
Customer Relationships [Member] | GECO Avionics, LLC
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	11 years
Finite-lived Intangible Assets Acquired	$ 5,500,000
Customer Relationships [Member] | Germane Systems
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		11 years
Finite-lived Intangible Assets Acquired		$ 8,500,000
Developed Technology Rights [Member] | GECO Avionics, LLC
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Finite-lived Intangible Assets Acquired	$ 4,800,000
Developed Technology Rights [Member] | Germane Systems
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		8 years
Finite-lived Intangible Assets Acquired		$ 4,200,000
Order or Production Backlog [Member] | GECO Avionics, LLC
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years
Finite-lived Intangible Assets Acquired	$ 600,000
Order or Production Backlog [Member] | Germane Systems
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		1 year
Finite-lived Intangible Assets Acquired		$ 210,000