Acquisitions Narrative (Details) $ in Thousands			3 Months Ended	12 Months Ended
	Sep. 21, 2016 USD ($)	Aug. 11, 2015 USD ($)	Mar. 31, 2016 USD ($) Acquisition	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Cash paid, net of cash acquired				$ 1,341	$ 13,269	$ 0
Gain on sale of assets, net				403	$ 0	$ 0
Maxxton Holding B.V. (“MHB”)
Business Acquisition [Line Items]
Voting equity interest acquired (percent)		100.00%
Total Assets Acquired		$ 23,600
Cash paid, net of cash acquired		13,300
Deferred purchase price payable		6,800
Liabilities assumed		$ 3,500
Deferred purchase price payment period		5 years
Variable compensation arrangement term		5 years
Total expected compensation under variable compensation arrangement		$ 8,200
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Number of businesses acquired | Acquisition			3
Total Assets Acquired				25,804
Business combination, recognized identifiable assets acquired and liabilities assumed, net				25,564
Other Liabilities				$ 240
Acquisition related costs			$ 500
Indianapolis, IN
Business Acquisition [Line Items]
Proceeds from the sale of property	$ 6,700
Gain on sale of assets, net	$ 400