Acquisitions (Schedule of Unaudited Consolidated Pro Forma Results of Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Acquiree Contribution to Consolidated Financial Statements [Abstract]
Amortization of intangible assets	$ 5,011	$ 3,154
As Reported Consolidated
Net sales	924,559	932,566
Operating income	7,598	22,875
Net income	$ 4,147	$ 14,816
Earnings Per Share As Reported
Basic (in dollars per share)	$ 0.16	$ 0.58
Diluted (in dollars per share)	$ 0.16	$ 0.58
Pro Forma Consolidated
Net Sales		$ 937,782
Operating income		24,248
Net income		$ 15,841
Earnings Per Share Pro Forma
Basic (in dollars per share)		$ 0.62
Diluted (in dollars per share)		$ 0.61
Provision for income taxes	$ 2,633	$ 7,908
Intelisys [Member]
Acquiree Contribution to Consolidated Financial Statements [Abstract]
Net Sales	9,750	2,863
Amortization of intangible assets	1,676	530
Operating loss	(1,579)	(135)
Net loss	(973)	(85)
Fair Value Adjustment to Intangible Assets [Member] | Intelisys [Member]
Acquiree Contribution to Consolidated Financial Statements [Abstract]
Amortization of intangible assets		1,100
Earnings Per Share Pro Forma
Amortization intangible asset, net of tax		700
Fair Value Adjustment to Property, Plant and Equipment [Member] | Intelisys [Member]
Earnings Per Share Pro Forma
Depreciation		200
Depreciation, net of tax		100
Fair Value Adjustment To Acquisition-related Costs [Member] | Intelisys [Member]
Earnings Per Share Pro Forma
Acquisition costs		(400)
Fair Value Adjustment to Income Tax Expense [Member] | Intelisys [Member]
Earnings Per Share Pro Forma
Provision for income taxes		800
Fair Value, Inputs, Level 3 [Member] | Intelisys [Member]
Acquiree Contribution to Consolidated Financial Statements [Abstract]
Change in fair value of contingent consideration	$ 4,094	$ 830