Warranty Reserves (Tables)

3 Months Ended

Mar. 31, 2012

Warranty Reserves [Abstract]

Summary Of Changes In Accrued Warranty Reserves

	For the Three Months Ended March 31,
	2012			2011
Balance, beginning of period	$	1,693		$	2,196
Provision for warranty expense		561			614
Change in estimate, balance beginning of period		(60	)		(83	)
Settlement of warranty liability		(621	)		(964	)
Balance, end of period	$	1,573		$	1,763