Business Combinations (Narratives) (Details) $ in Thousands						3 Months Ended		9 Months Ended
	Dec. 01, 2017 USD ($)	Oct. 27, 2017 USD ($) Quarter	Jul. 14, 2017	Mar. 07, 2017 USD ($)	Oct. 28, 2016 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2018 USD ($) Acquisition	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Number of acquisitions completed | Acquisition								3
Upfront cash closing payment								$ 97,581	$ 51,088
Acquisition and integration related expenses						$ 9,316	$ 3,418	47,675	$ 9,908
Recorded gain from bargain purchase								5,030
Data Center Business
Business Acquisition [Line Items]
Asset purchase agreement closing date		Oct. 27, 2017
Upfront cash closing payment		$ 23,000
Deferred payment to be paid per quarter		$ 1,000
Number of quarters deferred payment to be paid | Quarter		20
Quarterly earn out payments in percentage of profits		50.00%
Quarterly earn out payments period		5 years
Increase in revenue								90,200
Acquisition and integration related expenses						5,000		38,800
Business acquisition, purchase price		$ 84,337
Net assets acquired, financing receivables						33,488		33,488		$ 33,488
Net assets acquired, identifiable intangible assets						32,200		32,200		28,600
Broadcom Corporation
Business Acquisition [Line Items]
Consent fee paid to terminate previous asset purchase agreement						25,000
Campus Fabric Business
Business Acquisition [Line Items]
Asset purchase agreement closing date			Jul. 14, 2017
Increase in revenue								127,700
Acquisition and integration related expenses						4,400		13,900
Business acquisition, purchase price				$ 100,000
Business acquisition, provisional consideration				$ 79,800
Net assets acquired, financing receivables						18,712		18,712		18,295
Net assets acquired, identifiable intangible assets						42,200		42,200		$ 46,900
Campus Fabric Business | In-Process Research and Development
Business Acquisition [Line Items]
Fair value of indefinite lived intangibles						2,600		2,600
Campus Fabric Business | Developed Technology
Business Acquisition [Line Items]
Fair value of indefinite lived intangibles						$ 2,600		$ 2,600
Capital Financing Business
Business Acquisition [Line Items]
Asset purchase agreement closing date	Dec. 01, 2017
Business combination, payments to seller in percentage of finance receivables	90.00%
Net assets acquired, financing receivables	$ 13,700
Net assets acquired, lease equipment	3,500
Net assets acquired, identifiable intangible assets	800
Fair value of contingent consideration	13,000
Capital Financing Business | Acquisition and Integration Costs
Business Acquisition [Line Items]
Recorded gain from bargain purchase	$ 5,000
Zebra Technologies Corporation
Business Acquisition [Line Items]
Asset purchase agreement closing date					Oct. 28, 2016
Net assets acquired, financing receivables					$ 14,636
Net assets acquired, identifiable intangible assets					20,300
Net cash consideration					$ 49,500