Warranty Reserves (Tables)

12 Months Ended

Dec. 31, 2011

Warranty Reserves [Abstract]

Schedule Of Changes In Accrued Warranty Reserves

	For the Years Ended December 31,
	2011			2010
Balance, beginning of year	$	2,196		$	3,104
Provision for warranty expense		2,507			3,113
Change in estimate, balance beginning of year		(395	)		(1,298	)
Settlement of warranty liability		(2,615	)		(2,723	)
Balance, end of year	$	1,693		$	2,196