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Stock-Based Compensation and Other Plans (Details 5) (Stock options)	12 Months Ended		3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2011 CEO
Significant assumptions used to estimate the fair value of share based compensation awards
Expected term	3 years 3 months 7 days	3 years 11 months 8 days
Expected volatility (as a percent)	73.60%	87.10%
Risk-free interest rate (as a percent)	0.50%	1.20%
Options granted (in shares)	33,333	218,684	33,334

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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