Quarterly Financial Data (Narrative) (Details) (USD $)	3 Months Ended
	Dec. 31, 2014 owners	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012
Quarterly Financial Data [Abstract]
Restructuring charges, per share	$ (0.04)	$ (0.02)	$ (0.04)	$ (0.02)	$ (0.03)	$ (0.04)	$ (0.47)	$ (0.01)	$ (0.01)	$ (0.07)	$ (0.06)	$ (0.02)
Gain on sale of assets, per share								$ 0.08
Pension plan settlement, per share	$ (0.16)										$ (2.34)	$ (0.22)
Tax settlement, per share												$ 0.22
Gain related to insurance recovery, per share		$ 0.01	$ 0.03
Number of beneficial owners, including employees owning shares through the Company's 401(k)	7,000