Acquisitions (Narrative) (Details) - USD ($) $ in Thousands				2 Months Ended	3 Months Ended	9 Months Ended
	Feb. 01, 2016	Aug. 22, 2014	Aug. 22, 2014	Mar. 31, 2016	Mar. 31, 2016	Mar. 31, 2016
HDB, Inc. [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Aug. 22, 2014
Business Acquisition, Name of Acquired Entity			HDB Ltd. Limited Partnership ("HDB").
Business Combination, Consideration Transferred			$ 5,551
Baillie Tank Equipment, Ltd. [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Feb. 01, 2016
Business Acquisition, Name of Acquired Entity	Baillie Tank Equipment, Ltd. (“BTE”)
Business Combination, Consideration Transferred	$ 13,049
Economic purchase price	$ 15,400
Acquisition costs					$ 800	$ 900
Revenue of Acquiree since Acquisition Date, Actual				$ 3,500
Earnings of Acquiree since Acquisition Date, Actual				$ 700