Acquisitions Finnveden Intangibles (Details) - USD ($) $ in Thousands	6 Months Ended
	Apr. 30, 2015	Jun. 30, 2014
Business Acquisition [Line Items]
Intangible assets	$ 26,180
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets	$ 18,308
Customer Relationships [Member] | Finnveden [Member]
Business Acquisition [Line Items]
Intangible assets		$ 1,136
Finite-Lived Intangible Asset, Useful Life	10 years