Discontinued Operations - Narrative (Details) $ in Thousands, € in Millions				1 Months Ended	3 Months Ended	12 Months Ended
	Sep. 30, 2015 payment	Aug. 10, 2015 EUR (€)	Aug. 10, 2015 USD ($)	Oct. 31, 2015 EUR (€)	Sep. 30, 2015 EUR (€)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Feb. 19, 2016 EUR (€)	Feb. 19, 2016 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of Tecnonet, net of cash divested and transaction costs in 2015						$ 4,789	$ 8,688	$ 0
Gain on sale of Tecnonet						$ 0	189	0
Tecnonet
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from intercompany obligation | €				€ 1.5
Disposed of by Sale | Tecnonet
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of Tecnonet, net of cash divested and transaction costs in 2015		€ 15.6	$ 17,000
Proceeds from intercompany obligation		€ 4.1	$ 4,600		€ 1.5
Working capital adjustment									€ 4.3	$ 4,800
Number of payments | payment	2
Gain on sale of Tecnonet							200
Foreign currency translation loss							2,180	$ 0
Transaction costs							800
Disposed of by Sale | Foreign Currency Gain (Loss) | Tecnonet
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Foreign currency translation loss							1,000
Disposed of by Sale | Related Party Payables | Tecnonet
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Foreign currency translation loss							1,200
Disposed of by Sale | Other Current Assets | Tecnonet
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Working capital adjustment							$ 4,800