Acquisitions (Details) - USD ($) $ in Thousands			6 Months Ended
	Dec. 12, 2016	Feb. 01, 2016	Dec. 31, 2016	Jun. 30, 2016
Business Acquisition [Line Items]
Goodwill, Acquired During Period			$ 35,028
Goodwill			113,019	$ 78,293
Houston Interests, LLC [Member]
Business Acquisition [Line Items]
Cash paid for equity interest	$ 46,000
Acquisition related adjustment for working capital settlement	4,129
Current assets	20,803
Property, plant and equipment	942
Goodwill	35,028
Other intangible assets	10,220
Total assets acquired	66,993
Current liabilities	16,674
Other long-term liabilities	190
Net assets acquired	50,129
Cash acquired	10,331
Business Combination, Consideration Transferred	$ 39,798
Warranty reserve working capital provision			$ 2,600
Baillie Tank Equipment, Ltd. [Member]
Business Acquisition [Line Items]
Current assets		$ 5,574
Property, plant and equipment		4,347
Goodwill		7,030
Other intangible assets		720
Other assets		233
Total assets acquired		17,904
Current liabilities		1,669
Deferred income taxes		329
Long-term debt		1,858
Other long-term liabilities		407
Net assets acquired		13,641
Cash acquired		592
Business Combination, Consideration Transferred		$ 13,049