Warranty Contracts (Tables)

12 Months Ended

Dec. 31, 2014

Warranty Contracts [Abstract]

Schedule Of Recognized Warranty Revenue And Incurred Warranty Costs

Warranty Revenue Recognition:
(in thousands)	Beginning Balance Deferred Warranty Revenue		Warranty Revenue Deferred		Warranty Revenue Recognized		Ending Balance Deferred Warranty Revenue
Year Ended December 31,
2014	$	9,141	$	17,185	$	(14,412)	$	11,914
2013		4,081		14,681		(9,621)		9,141
2012		3,094		7,540		(6,553)		4,081
Warranty Costs Incurred:
(in thousands)			Materials		Labor and Overhead		Total
Year Ended December 31,
2014			$	5,958	$	6,662	$	12,620
2013				4,441		4,821		9,262
2012				2,672		3,720		6,392