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		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current portion of contingent consideration	$ 39,445		$ 39,445			$ 42,975
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in fair value of contingent consideration	(5,101)	$ (4,801)	(11,535)	$ (28,595)
Fair value of liability for contingent consideration	74,259	101,778	74,259	101,778	$ 71,886	108,233	$ 97,031	$ 114,036
Barcode, Networking & Security Segment [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in fair value of contingent consideration	0	0	0	(69)
Fair value of liability for contingent consideration	0	0	0	0	0	0	0	0
Barcode, Networking & 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]
Change in fair value of contingent consideration		(100)
Communications & Services Segment [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in fair value of contingent consideration	(5,101)	(4,801)	(11,535)	(28,526)
Fair value of liability for contingent consideration	74,259	101,778	74,259	101,778	$ 71,886	$ 108,233	$ 97,031	$ 114,036
Communications & Services Segment [Member] \| Intelisys [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in fair value of contingent consideration	(2,600)	(3,000)	(9,000)	(12,200)
Fair value of liability for contingent consideration	74,300	93,700	74,300	93,700
Current portion of contingent consideration	39,400	32,700	39,400	32,700
Contingent consideration arrangements, maximum range of outcome	85,000		85,000
Communications & Services Segment [Member] \| Network1 [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in fair value of contingent consideration	$ (2,500)	(1,800)	$ (2,500)	(16,300)
Fair value of liability for contingent consideration		$ 8,100		$ 8,100