Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012 contract	Dec. 31, 2011 contract	Dec. 31, 2010
Certificates of Deposit, at Carrying Value	$ 26,045,000	$ 22,520,000
Cash And Cash Equivalents, Non-Domestic Account, At Carrying Value	38,731,000	28,639,000
Percentage of Weighted Average Cost Inventory	37.00%	43.00%
Goodwill, Impairment Loss	0	0	0
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	20 years	20 years
Accrual for Environmental Loss Contingencies	2,141,000	2,184,000
Revenues Recognized Using Percentage Of Completion Method, Less Than, Percentage Of Consolidated Revenues	10.00%
Costs in Excess of Billings on Uncompleted Contracts or Programs, Percentage (Less Than) Of Total Inventory At Cost, Classified As Work In Process	5.00%
Number of Foreign Currency Derivatives Held	0	0
Impact of Foreign Currency Derivatives on Earnings is Immaterial	Realized gains or losses from foreign currency hedges did not exceed $100,000 during the twelve month periods ended December 31, 2012, 2011 or 2010
Product Warranty Accrual	15,727,000	6,632,000
Foreign Currency Transaction Gain (Loss), Realized	(238,000)	237,000	(83,000)
Research and Development Expense	$ 2,926,000	$ 1,899,000	$ 273,000
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	25 years
Maximum [Member] | Building [Member]
Property, Plant and Equipment, Useful Life	40 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Useful Life	10 years
Maximum [Member] | Leasehold Improvements [Member]
Property, Plant and Equipment, Useful Life	7 years
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	5 years
Minimum [Member] | Building [Member]
Property, Plant and Equipment, Useful Life	25 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Useful Life	3 years
Minimum [Member] | Leasehold Improvements [Member]
Property, Plant and Equipment, Useful Life	2 years