Stock-Based Compensation (Schedule Of Share-Based Compensation Restricted Stock Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Stock-Based Compensation [Abstract]
Number of Restricted Shares Nonvested at beginning of period	646
Number of Restricted Shares granted	0
Number of Restricted Shares vested	0
Number of Restricted Shares forfeited	0
Number of Restricted Shares Nonvested at end of period	646
Weighted Average Grant Date Fair Value Nonvested at beginning of period	$ 20.29
Weighted Average Grant Date Fair Value Shares granted	$ 0.00
Weighted Average Grant Date Fair Value Shares vested	$ 0.00
Weighted Average Grant Date Fair Value Shares forfeited	$ 0.00
Weighted Average Grant Date Fair Value Nonvested at end of period	$ 20.29