Quarterly Financial Data (Narrative) (Details) (USD $)	3 Months Ended
	Dec. 31, 2013 owners	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011
Quarterly Financial Data [Abstract]
Restructuring charges, per share	$ 0.03	$ (0.04)	$ (0.47)	$ (0.01)	$ (0.02)	$ (0.05)	$ (0.06)	$ (0.01)	$ (0.10)	$ (0.06)	$ (0.04)	$ 0.00
Gain on sale of assets, per share				$ 0.08
Pension plan settlement, per share							$ (2.34)	$ (0.22)
Tax settlement, per share								$ 0.23
Per share tax effect from prior period corrections									$ 0.11
Number of beneficial owners, including employees owning shares through the Company's 401(k)	6,200