Income Taxes (Components Of Deferred Tax Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Foreign [Member] Minimum [Member]	Dec. 31, 2011 Foreign [Member] Maximum [Member]
Components Of Deferred Tax Assets And Liabilities [Line Items]
Postretirement benefits	$ 13,561	$ 16,369
Inventory reserves	3,773	2,830
Vacation allowances	1,319	1,535
Net operating losses and tax credit carryforwards	9,436	10,209
Post employment benefits	2,400	3,085
Foreign tax credit carryforwards (expiring between 2012 and 2020)	3,463	3,535
Stock options	7,815	6,446
Liability insurance	4,116	3,759
Basis of capital assets	1,102	1,970
Warranties	2,903	2,775
Reserve for doubtful accounts	1,581	2,226
Deferred revenue	217	1,240
Other	3,788	2,219
Total deferred tax assets	55,474	58,198
Valuation allowances	(2,777)	(4,323)
Net deferred tax assets	52,697	53,875
Property, plant and equipment	(13,565)	(22,697)
Pension	(18,609)	(44,897)
Intangibles	(16,209)	(1,527)
Other	(973)
Total deferred tax liabilities	(49,356)	(69,121)
Net deferred taxes	$ 3,341	$ (15,246)
Foreign tax credit carryforwards, expiration date			2012	2020