Equity Transactions And Stock-Based Compensation Plans Share-based Compensation Assumptions (Details) (USD $)	12 Months Ended
Dec. 31, 2011 Years	Dec. 31, 2010 Years	Dec. 31, 2009 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	65.00%	62.00%	58.00%
Risk-free interest rates	1.50%	2.60%	2.10%
Expected life in years	4.33	5.61	5.48
Grant-date fair value	$ 4.69	$ 4.91	$ 2.09

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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