Warranty Liability (Tables)

6 Months Ended

Jun. 30, 2012

Warranty Liability

Schedule of rollforward of Company's warranty liability

	Three months ended						Six months ended
	June 30, 2012			June 30, 2011			June 30, 2012			June 30, 2011
Balance at the beginning of the period	$	3,506		$	2,270		$	4,188		$	3,399
Warranty provision	643			1,244			773			1631
Claims paid/settlements	(184		)	(444		)	(996		)	(1,960		)
Balance at the end of the period	$	3,965		$	3,070		$	3,965		$	3,070