Warranty Reserves (Summary Of Changes In Accrued Warranty Reserves) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Warranty Reserves [Abstract]
Balance, beginning of year	$ 1,583	$ 1,693
Provision for warranty expense	1,899	2,321
Change in estimate, balance beginning of year	(133)	(92)
Settlement of warranty liability	(2,035)	(2,339)
Balance, end of year	$ 1,314	$ 1,583