Stock-Based Compensation Plan (Summary Of Stock Option Plan Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013 Employees [Member]	Dec. 31, 2012 Employees [Member]	Dec. 31, 2011 Employees [Member]	Dec. 31, 2013 Directors [Member]	Dec. 31, 2012 Directors [Member]	Dec. 31, 2011 Directors [Member]
Stock Options Activity [Roll Forward]
Options outstanding at beginning of period (in shares)	1,335,680	1,192,680	972,680
Options granted - directors and employees (in shares)				51,300	111,000	180,000	40,000	40,000	40,000
Options forfeited - employees (in shares)				(3,501)	(8,000)
Options exercised - employees (in shares)				(159,994)
Options outstanding at end of period (in shares)	1,263,485	1,192,680	972,680
Options exercisable at end of period (in shares)	1,049,685
Expected to vest after end of period (in shares)	213,800
Weighted Average Exercise Price [Roll Forward]
Options outstanding at beginning of period (in dollars per share)	$ 13.41	$ 12.89	$ 10.32
Options granted - directors and employees (in dollars per share)				$ 26.41	$ 17.77	$ 24.82	$ 26.41	$ 17.77	$ 21.62
Options forfeited - employees (in dollars per share)				$ 14.87	$ 17.77
Options exercised - employees (in dollars per share)				$ 9.53
Options outstanding at end of period (in dollars per share)	$ 14.84	$ 12.89	$ 10.32
Options exercisable at end of period (in dollars per share)	$ 13.09
Expected to vest after end of period (in dollars per share)	$ 23.45
Weighted Average Remaining Contractual Term [Abstract]
Options outstanding at end of period (in years)	5 years 9 months 18 days
Options exercisable at end of period (in years)	5 years 3 months 18 days
Expected to vest after end of period (in years)	8 years 7 months 6 days
Aggregate Intrinsic Value [Abstract]
Options exercised - employees				$ 2,334
Options outstanding at end of period	11,528
Options exercisable at end of period	11,164
Expected to vest after end of period	$ 363