Share-Based Compensation (Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Y	Dec. 31, 2010 Y	Dec. 31, 2009 Y
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Balance Outstanding (shares)	4,292,000	4,550,000	6,109,000
Outstanding, Weighted-Average Exercise Price (dollars per share)	$ 25.29	$ 25.35	$ 25.54
Shares from stock dividend (shares)			68,000
Shares from stock dividend, Weighted-Average Exercise Price (dollars per share)			$ 0.00
Exercised (shares)	0	(48,365)	(156,445)
Exercised, Weighted-Average Exercise Price (dollars per share)	$ 0.00	$ 17.18	$ 18.78
Forfeited (shares)	0	0	(1,000)
Forfeited, Weighted-Average Exercise Price (dollars per share)	$ 0.00	$ 0.00	$ 24.28
Expired (shares)	(2,215,000)	(210,000)	(1,472,000)
Expired, Weighted-Average Exercise Price (dollars per share)	$ 25.55	$ 25.14	$ 26.15
Balance Outstanding (shares)	2,077,000	4,292,000	4,550,000
Outstanding, Weighted-Average Exercise Price (dollars per share)	$ 25.15	$ 25.29	$ 25.35
Outstanding, Weighted-Average Remaining Contractual Term (years)	1.85	2.01	2.92
Outstanding, Intrinsic Value	$ 0	$ 70	$ 402
Exercisable (shares)	2,077,000
Exercisable, Weighted-Average Exercise Price (dollars per share)	$ 25.15
Exercisable, Weighted-Average Remaining Contractual Term (years)	1.85
Exercisable, Intrinsic Value	$ 0