Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands		1 Months Ended		12 Months Ended
	Dec. 17, 2014	Dec. 31, 2016	Jan. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Fines assessed	$ 1,600	$ 550
Loss contingency accrued		11,000		$ 11,000	$ 6,000
Guarantee amounts		218,000		218,000
Estimated environmental matters		$ 4,000		4,000	4,000
Warranty expense				$ 32,000	$ 32,000	$ 27,000
Judicial Ruling
Loss Contingencies [Line Items]
Fines paid			$ 1,600