Business Combinations (Narratives) (Details) $ in Thousands						3 Months Ended			6 Months Ended
	Dec. 01, 2017 USD ($)	Oct. 27, 2017 USD ($) Quarter	Jul. 14, 2017	Mar. 07, 2017 USD ($)	Oct. 28, 2016 USD ($)	Dec. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) Acquisition	Dec. 31, 2016 USD ($)	Sep. 30, 2017 USD ($)
Business Acquisition [Line Items]
Number of acquisitions completed | Acquisition									3
Upfront cash closing payment									$ 97,581	$ 51,088
Acquisition and integration related expenses						$ 34,115		$ 4,169	38,359	$ 6,490
Recorded gain from bargain purchase									4,920
Data Center Business
Business Acquisition [Line Items]
Business acquisition 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
Acquisition and integration related expenses						32,500			33,800
Business acquisition, purchase price		$ 84,337
Net assets acquired, financing receivables		33,488
Net assets acquired, identifiable intangible assets		$ 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]
Acquisition and integration related expenses						6,600			9,500
Asset purchase agreement closing date			Jul. 14, 2017
Business acquisition, purchase price				$ 100,000
Business acquisition, deposits amount							$ 10,200
Business acquisition, provisional consideration				$ 79,800
Net assets acquired, financing receivables						18,295			18,295		$ 18,112
Net assets acquired, identifiable intangible assets						46,900			46,900		$ 44,000
Campus Fabric Business | In-Process Research and Development
Business Acquisition [Line Items]
Fair value of indefinite lived intangibles						$ 2,500			$ 2,500
Capital Financing Business
Business Acquisition [Line Items]
Business combination, payments to seller in percentage of finance receivables	90.00%
Net assets acquired, financing receivables	$ 13,800
Net assets acquired, lease equipment	3,500
Net assets acquired, identifiable intangible assets	600
Fair value of contingent consideration	12,900
Capital Financing Business | Acquisition and Integration Costs
Business Acquisition [Line Items]
Recorded gain from bargain purchase	$ 4,900
Zebra Technologies Corporation
Business Acquisition [Line Items]
Net assets acquired, financing receivables					$ 14,636
Net assets acquired, identifiable intangible assets					20,300
Net cash consideration					$ 49,500