Geographic And Product Information (Net Sales For Product Lines) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Product Information [Line Items]
Net sales	$ 165,859	$ 172,152	$ 168,171	$ 141,852	$ 145,030	$ 156,379	$ 137,927	$ 123,192	$ 648,034	$ 562,528	$ 474,482
Materials Processing
Product Information [Line Items]
Net sales									608,702	492,013	419,443
Other applications
Product Information [Line Items]
Net sales									$ 39,332	$ 70,515	$ 55,039