Warranty Reserves (Tables)

9 Months Ended

Sep. 30, 2012

Warranty Reserves [Abstract]

Summary Of Changes In Accrued Warranty Reserves

	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
		2012		2011		2012		2011
Balance, beginning of period	$	1,499	$	1,675	$	1,693	$	2,196
Provision for warranty expense		539		668		1,655		1,763
Change in estimate, balance beginning of period		7		(172)		(92)		(394)
Settlement of warranty liability		(613)		(604)		(1,824)		(1,998)
Balance, end of period	$	1,432	$	1,567	$	1,432	$	1,567