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Stock Based Compensation - Options Grant (Details)	6 Months Ended	3 Months Ended
Stock Based Compensation - Options Grant (Details)	Jun. 30, 2012	Jun. 30, 2012 Stock Options [Member]	Mar. 31, 2012 Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	40,157	2,192	37,965
Dividend Yield		2.69%	3.09%
Expected Volatility		69.09%	69.90%
Risk-free Interest Rate		0.58%	0.61%
Expected Term (Years)		4 years	4 years

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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