Business Combinations Textuals (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014	Jun. 14, 2016	Sep. 30, 2015	Jul. 01, 2014	May 01, 2014
Business Acquisition [Line Items]
Total Consideration			$ 17,000
Net tangible assets acquired			3,863
Goodwill plus Intangibles Acquired			13,137
Funding from Holdback Payments			2,550
Seals Unlimited [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired				100.00%
FY2016 Acquisitions Seals, HUB, & Atlantic Fasteners [Member]
Business Acquisition [Line Items]
Total Consideration	$ 66,250
Net tangible assets acquired	22,650
Goodwill plus Intangibles Acquired	43,600
Funding from Holdback Payments	3,750
Knox Acquisition [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired						100.00%
Total Consideration		$ 132,000
Funding from Holdback Payments					$ 7,100	$ 14,000
Cash Paid at Close						$ 118,000
Debt Instrument, Interest Rate During Period		1.50%
Purchase price		$ 132,800
Reliance Acquisition [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired							100.00%
Total Consideration			$ 179,800
Funding from Holdback Payments	8,300						$ 20,000
Debt Instrument, Interest Rate During Period			2.00%
Purchase price			$ 188,500
Funding from Canadian Cash							31,900
Funding From Existing Credit Facility							36,600
Funding from New Credit Facility							$ 100,000
Business Acquisition, Transaction Costs			$ 1,448
Rodensa, GSB & Ira Acquisition [Member]
Business Acquisition [Line Items]
Total Consideration		54,900
Net tangible assets acquired		21,000
Goodwill plus Intangibles Acquired		33,900
Funding from Holdback Payments		$ 6,900
Other Current Liabilities [Member]
Business Acquisition [Line Items]
Funding from Holdback Payments	7,700
Other Liabilities [Member]
Business Acquisition [Line Items]
Funding from Holdback Payments	3,800
Other Noncurrent Liabilities [Member]
Business Acquisition [Line Items]
Funding from Holdback Payments	$ 2,500