Product Warranties (Tables)

6 Months Ended

Jun. 30, 2013

Product Warranties [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

The changes in the Company’s consolidated warranty reserve are as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Beginning balance	$	42,183		$	12,197		$	44,486		$	13,181
Warranty expense	3,077			2,613			7,096			3,602
Warranty usage	(6,246		)	(3,562		)	(12,568		)	(5,535		)
Ending balance	$	39,014		$	11,248		$	39,014		$	11,248

The increase between periods mainly represents the warranty reserve acquired during the AirSep acquisition in August 2012.