Common Stock Common Stock (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common stock, shares authorized	120,000,000	100,000,000
Common stock dividend rate percentage	5.00%
Common stock, par value	$ 5.00	$ 5.00
Antidilutive securities excluded from computation of earnings per share (in shares)	0	0	0
Shares available for purchase under the current Board authorization	5,000,000
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	1,898,007