Warranty Reserves (Tables)

3 Months Ended

Mar. 31, 2013

Warranty Reserves [Abstract]

Summary Of Changes In Accrued Warranty Reserves

	For the Three Months Ended March 31,
		2013		2012
Balance, beginning of period	$	1,583	$	1,693
Provision for warranty expense		321		561
Change in estimate, balance beginning of period		(132)		(60)
Settlement of warranty liability		(428)		(621)
Balance, end of period	$	1,344	$	1,573