Commitments and Contingent Liabilites (Tables)

9 Months Ended

Sep. 30, 2013

Commitments and Contingent Liabilities [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

		Warranty Liability
Balance at December 31, 2012	$	15,727
Additions to warranty liability		1,136
Warranty liability utilized		(9,102)
Balance at September 30, 2013	$	7,761