Shareholders' Equity (Changes In Shares Of Common Stock) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Shareholders Equity [Line Items]
Treasury stock, beginning balance	279,461
Shares issued, beginning balance	14,397,509
Stock options exercised	18,922
Treasury stock, ending balance	207,317	279,461
Shares issued, ending balance	14,397,509	14,397,509
Common Stock [Member]
Shareholders Equity [Line Items]
Shares outstanding, beginning balance	14,118,048	13,829,355
Shares issued for the SDN acquisition		235,912
Restricted stock awards issued	59,834	43,242
Restricted stock awards forfeited	(3,490)	(15,441)
Stock options exercised	18,922	34,082
Treasury stock purchases	(7,523)	(9,102)
Stock awards	$ 4,401
Shares outstanding, ending balance	14,190,192	14,118,048
Treasury Stock [Member]
Shareholders Equity [Line Items]
Treasury stock, beginning balance	279,461	332,242
Restricted stock awards issued	(59,834)	(43,242)
Restricted stock awards forfeited	3,490	15,441
Stock options exercised	(18,922)	(34,082)
Treasury stock purchases	7,523	9,102
Stock awards	$ (4,401)
Treasury stock, ending balance	207,317	279,461
Common Stock Issued [Member]
Shareholders Equity [Line Items]
Shares issued, beginning balance	14,397,509	14,161,597
Shares issued for the SDN acquisition		235,912
Shares issued, ending balance	14,397,509	14,397,509