Leases And Related Party Leases (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating Leased Assets [Line Items]
Total rental expense	$ 9.3	$ 8.2	$ 8.1
Related Party [Member]
Operating Leased Assets [Line Items]
Total rental expense	0.9	0.8	0.9
Term of lease	March 31, 2022
Option to renew lease	March 31, 2032
Payment per year to related party lessor	0.1
Percent of manufacturing facility owned by corporation whose shareholders are trusts whose beneficiaries include family members of company's former chairman	50.00%
Term of current lease agreement	October 31, 2017
Annual rate of lease agreement	0.3
Option to extend lease, years	15
Period for extended lease	November 1, 2017 through October 31, 2032
Annual rate for extended lease	$ 0.3
Five-Year Option Lease From November 1, 2032 Through October 31, 2037 [Member]
Operating Leased Assets [Line Items]
Option to extend lease, years	5
Period for extended lease	November 1, 2032 through October 31, 2037
Five-Year Option Lease From November 1, 2037 Through October 31, 2042 [Member]
Operating Leased Assets [Line Items]
Option to extend lease, years	5
Period for extended lease	November 1, 2037 through October 31, 2042