Stock Options (Schedule of Restricted Stock Award Activity) (Details) - Restricted Stock - $ / shares		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of year, Shares		12,043	10,724	11,375
Granted, Shares		26,004	6,000	4,224
Exercised, Shares		(5,431)	(4,681)	(4,875)
Cancelled, Shares		0	0	0
Outstanding at end of year, Shares		32,616	12,043	10,724
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value [Roll Forward]
Outstanding at beginning of year, Price	[1]	$ 44.10	$ 32.49	$ 24.24
Granted, Price	[1]	54.14	53.51	42.70
Exercised, Price	[1]	36.85	29.56	22.07
Cancelled, Price	[1]	0.00	0.00	0.00
Outstanding at end of year, Price	[1]	$ 53.31	$ 44.10	$ 32.49

[1] Weighted Averages