Common Shares And Stock-Based Awards Plans (Summary Of Stock Options) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Common Shares And Stock-Based Awards Plans [Abstract]
Number of Options, Outstanding, Beginning balance	4,525	4,825	5,531
Number of Options, Granted	432	399	61
Number of Options, Exercised	(375)	(257)	(290)
Number of Options, Forfeited or expired	(342)	(442)	(477)
Number of Options, Outstanding, Ending balance	4,240	4,525	4,825
Number of Options, Exercisable at December 31, 2012	3,517	3,700	3,600
Weighted-Average Exercise Price, Outstanding, Beginning balance	$ 19.69	$ 19.18	$ 19.20
Weighted-Average Exercise Price, Granted	$ 15.77	$ 18.56	$ 19.41
Weighted-Average Exercise Price, Exercised	$ 12.42	$ 9.98	$ 11.21
Weighted-Average Exercise Price, Forfeited or expired	$ 20.42	$ 18.74	$ 24.32
Weighted-Average Exercise Price, Outstanding, Ending balance	$ 19.88	$ 19.69	$ 19.18
Weighted-Average Exercise Price, Exercisable at December 31, 2012	$ 20.46	$ 20.32	$ 20.40
Weighted-Average Remaining Contractual Term (Years), Outstanding	4 years 9 months
Weighted-Average Remaining Contractual Term (Years), Exercisable at December 31, 2012	3 years 11 months 16 days
Aggregate Intrinsic Value, Outstanding at December 31, 2012	$ 2,601
Aggregate Intrinsic Value, Exercisable at December 31, 2012	$ 2,251