Warranties (Schedule Of Changes In Warranty Accrual) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Warranties [Abstract]
Beginning balance	$ 2,622	$ 2,194	$ 1,150
Warranty reserves assumed in business combinations			591
Warranty expense provisions	2,873	2,676	1,665
Payments	(1,610)	(1,628)	(1,030)
Warranty adjustment	(1,406)	(620)	(182)
Ending balance	$ 2,479	$ 2,622	$ 2,194