Stock-Based Compensation Stock-Based Compensation (Activity Pertaining to Stock Options) (Details) (Stock Options [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Beginning Balance	118,030	138,980	184,765
Weighted average grant date price, beginning balance	$ 33.03	$ 31.39	$ 31.11
Number of Shares, Granted	0	0	0
Weighted average grant date price, granted	$ 0.00	$ 0.00	$ 0.00
Number of Shares, Exercised	(48,110)	(18,850)	(42,285)
Weighted Average Grant Date Price, Exercised	$ 26.09	$ 20.38	$ 28.29
Number of Shares, Forfeited	(1,000)	(2,100)	(3,500)
Weighted average grant date price, forfeited	$ 37.83	$ 37.83	$ 53.90
Number of Shares, Ending Balance	68,920	118,030	138,980
Weighted average grant date price, ending balance	$ 37.81	$ 33.03	$ 31.39