Acquisition (Details) - USD ($) $ in Thousands	Jan. 07, 2015	Sep. 30, 2015
Purchase Price Allocation
Goodwill		$ 4,789
Leveltek Processing, LLC
Acquisition
Acquisition price	$ 14,600
Purchase Price Allocation
Property, plant and equipment, net	7,563
Customer relationships	2,100
Inventory	148
Total identifiable net assets	9,811
Goodwill	4,789
Total purchase price	14,600
Customer relationships | Leveltek Processing, LLC
Purchase Price Allocation
Customer relationships	$ 2,100