Commitments And Contingencies (Schedule Of Warranty Reserve) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Commitments And Contingencies [Abstract]
Balance at the beginning of the period	$ 1,885	$ 1,764
Accruals for warranties issued during the period	2,523	3,225
Settlements made (in cash or in kind) during the period	(2,689)	(3,119)
Balance at the end of the period	$ 1,719	$ 1,870