Acquisitions (Details) - USD ($) $ in Thousands			9 Months Ended
	Feb. 01, 2016	Aug. 22, 2014	Mar. 31, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Goodwill, Acquired During Period			$ 7,618
Goodwill			$ 78,845	$ 71,518
Baillie Tank Equipment, Ltd. [Member]
Business Acquisition [Line Items]
Current assets	$ 4,526
Property, plant and equipment	4,347
Goodwill	7,618
Other intangible assets	720
Other assets	84
Total assets acquired	17,295
Current liabilities	1,048
Deferred income taxes	341
Long-term debt	1,858
Other long-term liabilities	407
Net assets acquired	13,641
Cash acquired	592
Business Combination, Consideration Transferred	$ 13,049
HDB, Inc. [Member]
Business Acquisition [Line Items]
Current assets		$ 1,645
Property, plant and equipment		1,001
Tax deductible goodwill		3,065
Other intangible assets		900
Total assets acquired		6,611
Current liabilities		1,060
Net assets acquired		5,551
Business Combination, Consideration Transferred		$ 5,551