Warranty Liability (Tables)

9 Months Ended

Sep. 30, 2012

Warranty Liability

Schedule of rollforward of Company's warranty liability

	Three months ended						Nine months ended
	September 30, 2012			September 30, 2011			September 30, 2012			September 30, 2011
Balance at the beginning of the period	$	3,965		$	3,070		$	4,188		$	3,399
Warranty provision	293			890			1,066			2,521
Claims paid/settlements	(85		)	(184		)	(1,081		)	(2,144		)
Balance at the end of the period	$	4,173		$	3,776		$	4,173		$	3,776