Provision For Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Sep. 30, 2011	Dec. 31, 2008
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Income generated by operations outside the United States	$ 11,800,000	$ 12,700,000	$ 10,700,000
Unrecognized tax benefits recorded in accrued pension and other liabilities	4,600,000	12,600,000
Unrecognized tax benefits	4,078,000	11,215,000	11,704,000	2,800,000	12,249,000
Accrued interest and penalties related to unrecognized tax benefits	(700,000)	400,000
Payment of interest and penalties	800,000	1,500,000
Gross unrecognized tax benefits that would impact effective tax rate	2,900,000	4,900,000
Transfer Pricing [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Gross unrecognized tax benefits that would impact effective tax rate	1,200,000
Unrecognized tax benefits will be realized in the next twelve months as a result of the expiration of statute limitations	$ 2,100,000