For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

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Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer.

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Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair Value of Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current portion of contingent consideration	$ 42,975	$ 42,975	$ 30,675
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss (gain) due to change in fair value of contingent consideration		37,043	5,211
Fair value of liability for contingent consideration	108,233	108,233	114,036	$ 24,652
Worldwide Barcode, Networking and Security Segment [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss (gain) due to change in fair value of contingent consideration		69	0
Fair value of liability for contingent consideration	0	0	0	0
Worldwide Barcode, Networking and Security Segment [Member] \| POS Portal [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss (gain) due to change in fair value of contingent consideration		100
Worldwide Barcode, Networking and Security Segment [Member] \| CDC Brasil S A [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss (gain) due to change in fair value of contingent consideration				200
Worldwide Communications and Services Segment [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss (gain) due to change in fair value of contingent consideration		36,974	5,211
Fair value of liability for contingent consideration	108,233	108,233	114,036	$ 24,652
Worldwide Communications and Services Segment [Member] \| Network1 [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss (gain) due to change in fair value of contingent consideration	21,000		(5,800)
Fair value of liability for contingent consideration	10,700	10,700	6,900
Current portion of contingent consideration			5,400
Worldwide Communications and Services Segment [Member] \| Intelisys [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss (gain) due to change in fair value of contingent consideration		16,000	12,100
Fair value of liability for contingent consideration	97,500	97,500	107,100
Current portion of contingent consideration	32,200	32,200	25,300
Undiscounted contingent consideration payments, maximum	$ 115,300	$ 115,300
Worldwide Communications and Services Segment [Member] \| Imago [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss (gain) due to change in fair value of contingent consideration			$ (1,100)