Stock-Based Compensation (Schedule Of Share Based Compensation, Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			12 Months Ended
	Sep. 30, 2011 years	Jun. 30, 2011 years	Mar. 31, 2011 years	Dec. 31, 2010 securities years
Stock-Based Compensation [Abstract]
Beginning balance, Shares	4,369,908	4,378,900	4,947,348
Beginning balance, Weighted-Average Exercise Price	$ 28.85	$ 28.86	$ 27.93
Beginning balance, Weighted-Average Remaining Contractual Life (in years)	3.6	3.9	3.7
Beginning balance, Aggregate Intrinsic Value	$ 69	$ 178	$ 334
Exercised, Shares	0	0	(86,860)	0
Exercised, Weighted-Average Exercise Price			$ 15.05
Forfeited, Shares	(1,143)	(8,992)	(481,588)
Forfeited, Weighted-Average Exercise Price	$ 26.92	$ 32.30	$ 21.82
Ending balance, Shares	4,368,765	4,369,908	4,378,900	4,947,348
Ending balance, Weighted-Average Exercise Price	$ 28.86	$ 28.85	$ 28.86	$ 27.93
Ending balance, Weighted-Average Remaining Contractual Life	3.4	3.6	3.9	3.7
Ending balance, Aggregate Intrinsic Value	0	69	178	334
Exercisable, Shares	4,144,071
Exercisable, Weighted-Average Exercise Price	$ 29.15
Exercisable, Weighted-Average Remaining Contractual Life	3.2
Exercisable, Aggregate Intrinsic Value	$ 0