Stock-Based Compensation (Schedule Of Share-Based Compensation Stock Options Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Share-based Arrangements with Employees and Nonemployees [Abstract]
Number of Options Outstanding at beginning of period	800
Number of Options granted	0	0
Number of Options exercised	(12)
Number of Options forfeited	(2)
Number of Options expired	0
Number of Options Outstanding at end of period	786
Number of Options Exercisable at end of period	599
Weighted Average Exercise Price Outstanding at beginning of period	$ 17.92
Weighted Average Exercise Price Options granted	$ 0.00
Weighted Average Exercise Price Options exercised	$ 18.17
Weighted Average Exercise Price Options forfeited	$ 22.28
Weighted Average Exercise Price Options expired	$ 0.00
Weighted Average Exercise Price Outstanding at end of period	$ 17.90
Weighted Average Exercise Price Exercisable at end of period	$ 17.61
Weighted Average Remaining Contractual Term Outstanding at end of period, Years	3 years 282 days
Weighted Average Remaining Contractual Term Exercisable at end of period, Years	3 years
Aggregate Intrinsic Value Outstanding at end of period	$ 4,901
Aggregate Intrinsic Value Exercisable at end of period	$ 3,914