Equity Transactions And Stock-Based Compensation Plans Schedule of Stock-Based Compensation Activity (Details) (USD $)	12 Months Ended
	Dec. 31, 2011 Years	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding stock options, at beginning of year, Number of Shares	5,688,279	5,055,613
Outstanding stock options, at beginning of year, Weighted-Average Exercise Price Per Share	$ 9.98	$ 10.17
Granted, Number of Shares	602,298	787,200
Granted, Weighted-Average Exercise Price Per Share	$ 9.05	$ 8.64
Forfeited, Number of Shares	(210,184)	(90,634)
Forfeited, Weighted-Average Exercise Price Per Share	$ 12.41	$ 12.84
Exercised, Number of Shares	(517,045)	(63,900)
Exercised, Weighted-Average Exercise Price Per Share	$ 5.58	$ 3.73
Outstanding stock options, at end of year, Number of Shares	5,563,348	5,688,279
Outstanding stock options, at end of year, Weighted-Average Exercise Price Per Share	$ 10.20	$ 9.98
Outstanding stock options, at end of year, Weighted-Average Remaining Contractual Life in Years	6.3
Stock options exercisable as of December 31, 2011, Number of Shares	4,032,111
Stock options exercisable as of December 31, 2011,, Weighted-Average Exercise Price Per Share	$ 11.27
Stock options exercisable as of December 31, 2011, Weighted Average Remaining Contract Life in Years	5.6
Nonvested stock options, at beginning of year, Number of Shares	2,184,683	2,537,474
Nonvested stock options, at beginning of year, Weighted-Average Grant-Date Fair Value Per Share	$ 3.83	$ 3.65
Granted, Number of Shares	602,298	787,200
Granted, Weighted-Average Grant-Date Fair Value Per Share	$ 4.69	$ 4.91
Vested, Number of Shares	(1,154,360)	(1,115,991)
Vested, Weighted-Average Grant-Date Fair Value Per Share	$ 4.03	$ 4.19
Forfeited, Number of Shares	(101,384)	(24,000)
Forfeited, Weighted-Average Grant-Date Fair Value Per Share	$ 4.34	$ 3.34
Nonvested stock options, at end of year, Number of Shares	1,531,237	2,184,683
Nonvested stock options, at end of year, Weighted-Average Grant-Date Fair Value Per Share	$ 3.98	$ 3.83