Stock-Based Compensation Plan (Summary Of Stock Option Plan Activity) (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Stock Options Activity [Roll Forward]
Options outstanding at beginning of period (in shares)	1,263,485	1,335,680
Options outstanding at end of period (in shares)	1,426,485	1,267,485
Options exercisable at end of period (in shares)	1,154,844	1,033,498
Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of period (in dollars per share)	$ 14.84	$ 13.41
Outstanding at end of period (in dollars per share)	$ 15.67	$ 14.85
Exercisable at end of period (in dollars per share)	$ 14.13	$ 12.93
Weighted Average Remaining Contractual Term [Abstract]
Weighted average remaining term of the stock options exercisable (in years)	4 years 9 months 18 days	5 years 6 months
Employees [Member]
Stock Options Activity [Roll Forward]
Options granted - directors and employees (in shares)	120,000	51,300
Options forfeited - employees (in shares)	(5,417)	(834)
Options exercised - employees (in shares)	(1,583)	(158,661)
Weighted Average Exercise Price [Roll Forward]
Granted - directors and employees (in dollars per share)	$ 22.09	$ 26.41
Forfeited - employees (in dollars per share)	$ 22.55	$ 5.60
Options exercised - employees (in dollars per share)	$ 17.77	$ 9.46
Directors [Member]
Stock Options Activity [Roll Forward]
Options granted - directors and employees (in shares)	50,000	40,000
Weighted Average Exercise Price [Roll Forward]
Granted - directors and employees (in dollars per share)	$ 22.09	$ 26.41