Stock-Based Compensation Arrangements (Schedule Of Performance-Based Share Awards) (Details) (Executive Officer [Member], Performance Unit Award Agreements [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Executive Officer [Member] | Performance Unit Award Agreements [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Number of Shares, Balance Outstanding, Beginning of period	357
Number of Shares, Granted	562
Nuimber Of Shares, Forfeited	(16)
Number of Shares, Balance Outstanding, End of period	903
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value [Roll Forward]
Weighted Average Grant Date Fair Value per Share, Balance Outstanding, Beginning of period	$ 16.72
Weighted Average Grant Date Fair Value per Share, Granted	$ 7.41
Weighted Average Grant Date Fair Value per Share, Forfeited	$ 10.56
Weighted Average Grant Date Fair Value per Share, Balance Outstanding, End of period	$ 11.04