Commitments and Contingent Liabilites (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingent Liabilities [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

		Warranty Liability
Balance at December 31, 2015	$	8,755
Additions to warranty liability		2,524
Warranty liability utilized		(1,125)
Balance at December 31, 2016	$	10,154

Environmental Loss Contingencies [Table Text Block]

		Environmental liability
Balance at December 31, 2015	$	6,640
Additions to environmental obligations		379
Environmental obligations utilized		(749)
Balance at December 31, 2016	$	6,270